cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Unendliche Weiten - Mathematische und philosophische Betrachtungen von verschiedenen Unendlichkeitsbegriffen
Creators: name: Ulu, Tayyibe
Year: 2017

description: In meiner Diplomarbeit werde ich wichtige Begriffe der Mathematik aus philosophischer Sicht behandeln, um zugleich auch den Zusammenhang von Philosophie und Mathematik sichtbar machen zu können. Dabei spielen der Zahlbegriff, der Unendlichkeitsbegriff, der Mengenbegriff und der Begriff des Infinitesimalen eine Große Rolle.
Failure of Suspension Bridge Cable Wire
Creators: name: Wohlgemuth, George F.
Publisher: name: American University
Year: 2023
Subjects: classificationCode: 40
subject: Engineering
classificationCode: 4005
subject: Civil engineering
subject: FOS: Civil engineering
classificationCode: 4017
subject: Mechanical engineering
subject: FOS: Mechanical engineering

description: Description to be added
Gröbner geometry for skew-symmetric matrix Schubert varieties
Creators: name: Marberg, Eric
name: Pawlowski, Brendan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Geometry (math.AG)
subject: Commutative Algebra (math.AC)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: Matrix Schubert varieties are the closures of the orbits of $B\times B$ acting on all $n\times n$ matrices, where $B$ is the group of invertible lower triangular matrices. Extending work of Fulton, Knutson and Miller identified a Gröbner basis for the prime ideals of these varieties. They also showed that the corresponding initial ideals are Stanley-Reisner ideals of shellable simplicial complexes, and derived a related primary decomposition in terms of reduced pipe dreams. These results lead to a geometric proof of the Billey-Jockusch-Stanley formula for a Schubert polynomial, among many other applications. We define skew-symmetric matrix Schubert varieties to be the nonempty intersections of matrix Schubert varieties with the subspace of skew-symmetric matrices. In analogy with Knutson and Miller's work, we describe a natural generating set for the prime ideals of these varieties. We then compute a related Gröbner basis. Using these results, we identify a primary decomposition for the corresponding initial ideals involving certain fpf-involution pipe dreams. We show that these initial ideals are likewise the Stanley-Reisner ideals of shellable simplicial complexes. As an application, we give a geometric proof of an explicit generating function for symplectic Grothendieck polynomials. Our methods differ from Knutson and Miller's and can be used to give new proofs of some of their results, as we explain at the end of this article.
description: 45 pages; v2: fixed several typos; v3: minor corrections, updated references, final version
First-principles Calculations of Raman and Infrared Spectroscopy For Phase Identification and Strain Calibration of Hafnia
Creators: name: Raeliarijaona, Aldo
name: Cohen, R. E.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Using density functional perturbation theory (DFPT) we computed the phonon frequencies, Raman and IR activities of hafnia polymorphs (P4$_{2}$nmc, Pca2$_{1}$, Pmn2$_{1}$, Pbca OI, brookite, and baddeleyite) for phase identification. We investigated the evolution of Raman and IR activities with respect to epitaxial strain and provide plots of frequency differences as a function of strain for experimental calibration and identification of the strain state of the sample. We found Raman signatures of different hafnia polymorphs: $ω(A_{1g})=300$ cm$^{-1}$ for P4$_{2}$nmc, $ω(A_{1})=343$ cm$^{-1}$ for Pca2$_{1}$, $ω(B_{2})=693$ cm$^{-1}$ for Pmn2$_{1}$, $ω(A_{g})=513$ cm$^{-1}$ for Pbca (OI), $ω(A_{g})=384$ cm$^{-1}$ for brookite, and $ω(A_{g}) = 496$ cm$^{-1}$ for baddeleyite. We also identified the Raman $B_{1g}$ mode, an anti-phase vibration of dipole moments, ( $ω(B_{1g}) = 758$ cm$^{-1}$ for OI, $ω(B_{1g})= 784$ cm$^{-1}$ for brookite) as the Raman signature of antipolar Pbca structures. We calculated a large splitting between longitudinal optical (LO) and transverse optical (TO) modes ($Δ{ω_{\text{LO-TO}}(A^{z}_{1})}=255$ cm$^{-1}$ in Pca2$_{1}$, and $Δ{ω_{\text{LO-TO}}(A_{1})}=263$ cm$^{-1}$ in Pmn2$_{1}$) to the same order as those observed in perovskite ferroelectrics, and related them to the anomalously large Born effective charges of Hf atoms ($Z^{*}(\text{Hf}) = 5.54$).
Event-shaped-dependent cumulants in p-Pb collisions at 5.02 TeV
Creators: name: Wei, De-Xian
name: Zhou, Li-Juan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper, we present a novel event-shaped cumulants (ESC) response approach, based on a multi-phase transport (AMPT) model simulations, to analyze p-Pb collisions at $\sqrt{s_{NN}}$= 5.02 TeV. We find that the Pearson coefficients between the subset cumulants of the final harmonics $v_{2}\{2k\}~(k=1,2,3,4)$ and the subset cumulants of initial eccentricity $\varepsilon_{2}\{2k\}$ in the ESC basis are significantly enhanced. These Pearson coefficients are strongly-dependent on the charged multiplicity, the set number of events (SNE), and only weakly-dependent on the order of the multi-particle cumulants (two-particles, four-particles, and so on). Our results show that the ESC method can suppress the event-by-event fluctuations.
description: 10 pages, 6 figures; The version is accepted by IJMPE
Runaway electron generation during tokamak start-up
Creators: name: Hoppe, M.
name: Ekmark, I.
name: Berger, E.
name: Fülöp, T.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Tokamak start-up is characterized by low electron densities and strong electric fields, in order to quickly raise the plasma current and temperature, allowing the plasma to fully ionize and magnetic flux surfaces to form. Such conditions are ideal for the formation of superthermal electrons, which may reduce the efficiency of ohmic heating and prevent the formation of a healthy thermal fusion plasma. This is of particular concern in ITER where engineering limitations put restrictions on the allowable electric fields and limit the prefill densities during start-up. In this study, we present a new 0D burn-through simulation tool called STREAM (STart-up Runaway Electron Analysis Model), which self-consistently evolves the plasma density, temperature and electric field, while accounting for the generation and loss of relativistic runaway electrons. After verifying the burn-through model, we investigate conditions under which runaway electrons can form during tokamak start-up as well as their effects on the plasma initiation. We find that Dreicer generation plays a crucial role in determining whether a discharge becomes runaway-dominated or not, and that a large number of runaway electrons could limit the ohmic heating of the plasma, thus preventing successful burn-through or further ramp-up of the plasma current. The runaway generation can be suppressed by raising the density via gas fuelling, but only if done sufficiently early. Otherwise a large runaway seed may have already been built up, which can avalanche even at relatively low electric fields and high densities.
description: 23 pages, 8 figures
Observation of the Wannier-Stark ladder in plasmonic waveguide arrays
Creators: name: Wetter, Helene
name: Fedorova, Zlata
name: Linden, Stefan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Evanescently coupled waveguides are a powerful platform to study and visualize the wave dynamics in tight-binding systems. Here, we investigate the propagation of surface plasmon polaritons in arrays of dielectric loaded surface plasmon polariton waveguides with a propagation constant gradient acting as an effective external potential. Using leakage radiation microscopy, we observe in real-space for single site excitation a periodic breathing of the wavepacket and an oscillatory motion in the case of Gaussian excitation of multiple waveguides. The corresponding momentum resolved spectra are composed of sets of equally spaced modes. We interpret these observation as the plasmonic analogues of Bloch oscillations and the Wannier-Stark ladder, respectively.
description: 5 pages, 4 figures
Times Mirror Poll # 1993-NII0493: April News Interest Index
Creators: name: Times Mirror Center For The People & The Press
Publisher: name: Roper Center for Public Opinion Research
Year: 2003

description: Bill Clinton job approval (1); Bob Dole job approval (1); Stories of past month (13); Support Bill Clinton's economic plan (3); Bill Clinton's higher priority (1); Bill Clinton getting his economic plan enacted (3); Rodney King Trial (5); Incident in Waco, Texas (2); Political Parties (4); Things in the news (6); Current events radio (3); Vote in last presidential election (1).
Choneplax Dall 1882
Creators: name: Dell'Angelo, Bruno
name: Landau, Bernard M.
name: Sosso, Maurizio
name: Taviani, Marco
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Polyplacophora
Chitonida
Acanthochitonidae
Choneplax

description: Genus Choneplax Dall, 1882
Type species. Chiton strigatus Sowerby, 1840 (= Chitonellus latus Guilding, 1829), by original designation.
Remarks. The genus Choneplax Dall, 1882 includes four Recent species (Sirenko 2003): C. lata (Guilding, 1829) from the Caribbean, C. hastata (Sowerby, 1840), habitat unknown (fide Sirenko 2003), C. indica from the W. Indian Ocean, and C. littlerorum Sirenko, 2003 from American Samoa. This is the first fossil record for the genus.
Distribution. Indian and Pacific (American Samoa) Oceans, and West Atlantic, Pleistocene to present-day.
description: Published as part of Dell'Angelo, Bruno, Landau, Bernard M., Sosso, Maurizio & Taviani, Marco, 2020, Late Pleistocene Red Sea Mollusca: 1. Polyplacophora, pp. 401-449 in Zootaxa 4772 (3) on page 435, DOI: 10.11646/zootaxa.4772.3.1, http://zenodo.org/record/3819654
Magneto-Seebeck effect in bismuth
Creators: name: Spathelf, Felix
name: Fauqué, Benoît
name: Behnia, Kamran
Publisher: name: arXiv
Year: 2022
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Thermoelectricity was discovered almost two centuries ago in bismuth. The large and negative Seebeck coefficient of this semimetal remains almost flat between 300 K and 100 K. This striking feature can be understood by considering the ratio of electron and hole mobilities and the evolution of their equal densities with temperature. The large and anisotropic magneto-Seebeck effect in bismuth, on the other hand, has not been understood up to the present day. Here, we report on a systematic study of the thermopower of bismuth from room temperature down to 20 K upon application of a magnetic field of 13.8 T in the binary-bisectrix plane. The amplitude of the Seebeck coefficient depends on the orientation of the magnetic field and the anisotropy changes sign with decreasing temperature. The magneto-Seebeck effect becomes non-monotonic at low temperatures. When the magnetic field is oriented along the binary axis, the Seebeck coefficient is not the same for positive and negative fields. This so-called Umkehr effect arises because the high symmetry axes of the Fermi surface ellipsoids are neither parallel to each other nor to the high symmetry axes of the lattice. The complex evolution of thermopower can be accounted for in a large part of the ($T,B,Θ$)-space by a model based on semiclassical transport theory and incorporating Landau quantization. The employed energy dependence of the scattering time is compatible with electron-acoustic phonon scattering. We find that the transverse Nernst response plays an important role in setting the amplitude of the longitudinal magneto-Seebeck effect. Furthermore, Landau quantization significantly affects thermoelectricity up to temperatures as high as 120 K.
description: 15 pages, 11 figures and a supplement
Sonnenfleckenzeichnung Nr. 117.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 17.05.1966, erstellt von Araldo Pittini, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1966

description: Bleistiftzeichnung mit Tinte und Farbstift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf dem Vordruck der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert
description: ETH-Bibliothek
The CH$_4$ abundance in Jupiter's upper atmosphere
Creators: name: Sánchez-López, A.
name: López-Puertas, M.
name: García-Comas, M.
name: Funke, B.
name: Fouchet, T.
name: Snellen, I. A. G.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Hydrocarbon species, and in particular CH$_4$, play a key role in the stratosphere--thermosphere boundary of Jupiter, which occurs around the $μ$-bar pressure level. Previous analyses of solar occultation, He and Ly-$α$ airglow, and ISO/SWS measurements of the radiance around 3.3 $μ$m have inferred significantly different methane concentrations. Here we aim to accurately model the CH$_4$ radiance at 3.3 $μ$m measured by ISO/SWS by using a comprehensive non-local thermodynamic equilibrium model and the most recent collisional rates measured in the laboratory for CH$_4$ to shed new light onto the methane concentration in the upper atmosphere of Jupiter. These emission bands have been shown to present a peak contribution precisely at the $μ$-bar level, hence directly probing the region of interest. We find that a high CH$_4$ concentration is necessary to explain the data, in contrast with the most recent analyses, and that the observations favour the lower limit of the latest laboratory measurements of the CH$_4$ collisional relaxation rates. Our results provide precise constraints on the composition and dynamics of the lower atmosphere of Jupiter.
description: 15 pages; accepted for publication in A&A
Generation and acceleration of high brightness electrons beams bunched at X-ray wavelengths using plasma-based acceleration
Creators: name: Xu, Xinlu
name: Li, Fei
name: Tsung, Frank S.
name: Miller, Kyle
name: Yakimenko, Vitaly
name: Hogan, Mark J.
name: Joshi, Chan
name: Mori, Warren B.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We show using particle-in-cell (PIC) simulations and theoretical analysis that a high-quality electron beam whose density is modulated at angstrom scales can be generated directly using density downramp injection in a periodically modulated density in nonlinear plasma wave wakefields. The density modulation turns on and off the injection of electrons at the period of the modulation. Due to the unique longitudinal mapping between the electrons' initial positions and their final trapped positions inside the wake, this results in an electron beam with density modulation at a wavelength orders of magnitude shorter than the plasma density modulation. The ponderomotive force of two counter propagating lasers of the same frequency can generate a density modulation at half the laser wavelength. Assuming a laser wavelength of $0.8\micro\meter$, fully self-consistent OSIRIS PIC simulations show that this scheme can generate high quality beams modulated at wavelengths between 10s and 100 angstroms. Such beams could produce fully coherent, stable, hundreds of GW X-rays by going through a resonant undulator.
description: 6 pages, 4 figures
Light Deflection Angle by Superentropic Black Holes
Creators: name: Belhaj, A.
name: Belmahi, H.
name: Benali, M.
name: Moumni, H. El
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Motivated by recent works on light deflection and shadow behaviors on AdS geometries, we investigate the deflection angle of light rays by superentropic black holes. Taking appropriate approximations, we first obtain the involved expression. For large values of the impact parameter, we get a specific value being zero for ordinary black holes without AdS backgrounds. Then, we examine and analyze such an optical quantity by providing graphical discussions in terms of a bounded region of the moduli space required by superentropic black hole conditions. Concretely, we study the deflection angle aspects by varying the black hole mass being fixed in the previous findings.
description: latex, 12 pages, 2 figures. Accepted version in IJMPD 2022
Ética Editorial
Creators: name: Virella, Daniel
Publisher: name: Portuguese Journal of Pediatrics
Year: 2014

description: Congratulamo-nos com a publicação neste número da Acta Pediátrica Portuguesa (APP) de uma Carta ao Director na qual os autores reconhecem publicamente que por lapso omitiram o agradecimento a uma colega, cuja contribuição clínica foi particularmente importante para a investigação do caso relatado. Não podemos deixar de aproveitar este facto para recordar que a qualidade duma revista médica não passa apenas pela excelência clínica e rigor científico dos artigos publicados, mas também pelo respeito de princípios éticos. Este aspecto é também abordado neste número no artigo de opinião assinado pelo Dr Jorge Amil Dias. A renovação da APP não passará apenas pelos aspectos formais de apresentação dos manuscritos e da sua publicação, nem somente pela insistência no rigor metodológico, clínico e de linguagem. Insistiremos também em reforçar o cumprimento de princípios éticos.
description: Portuguese Journal of Pediatrics, Vol 37 No 1 (2006)
High dimensional regimes of non-stationary Gaussian correlated Wishart matrices
Creators: name: Bourguin, Solesne
name: Dang, Thanh
Publisher: name: arXiv
Year: 2020
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We study the high-dimensional asymptotic regimes of correlated Wishart matrices $d^{-1}\mathcal{Y}\mathcal{Y}^T$, where $\mathcal{Y}$ is a $n\times d$ Gaussian random matrix with correlated and non-stationary entries. We prove that under different normalizations, two distinct regimes emerge as both $n$ and $d$ grow to infinity. The first regime is the one of central convergence, where the law of the properly renormalized Wishart matrices becomes close in Wasserstein distance to that of a Gaussian orthogonal ensemble matrix. In the second regime, a non-central convergence happens, and the law of the normalized Wishart matrices becomes close in Wasserstein distance to that of the so-called Rosenblatt-Wishart matrix recently introduced by Nourdin and Zheng. We then proceed to show that the convergences stated above also hold in a functional setting, namely as weak convergence in $C([a,b];M_n(\mathbb{R}))$. As an application of our main result (in the central convergence regime), we show that it can be used to prove convergence in expectation of the empirical spectral distributions of the Wishart matrices to the semicircular law. Our findings complement and extend a rich collection of results on the study of the fluctuations of Gaussian Wishart matrices, and we provide explicit examples based on Gaussian entries given by normalized increments of a bi-fractional or a sub-fractional Brownian motion.
Modelling the Partially Coherent Behaviour of Few-Mode Far-Infrared Grating Spectrometers
Creators: name: Lap, B. N. R.
name: Withington, S.
name: Jellema, W.
name: Naylor, D. A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Modelling ultra-low-noise far-infrared grating spectrometers has become crucial for the next generation of far-infrared space observatories. Conventional techniques are awkward to apply because of the partially coherent form of the incident spectral field, and the few-mode response of the optics and detectors. We present a modal technique for modelling the behaviour of spectrometers, which allows for the propagation and detection of partially coherent fields, and the inclusion of straylight radiated by warm internal surfaces. We illustrate the technique by modelling the behaviour of the Long Wavelength Band of the proposed SAFARI instrument on the well-studied SPICA mission.
description: This paper is submitted to Journal Optical Society of America A. When accepted, the paper can be found here: https://opg.optica.org/josaa/home.cfm
Investigation on the self-starting Mamyshev oscillator with low threshold
Creators: name: Guo, Wei
name: Lu, Sihua
name: He, Qiurun
name: Zhang, Baofu
name: Ma, Shanchao
name: Jiao, Zhongxing
name: Lai, Tianshu
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We have demonstrated a mode-locked Mamyshev oscillator based on a single-mode-fibre configuration with low threshould. The influences of spectral filters and the pump power on the output laser characteristics have been investigated. In the case with spectral-filter central wavelength far away from the peak of gain spectrum, the laser pulses have deviated slightly from similariton evolution with gain-shaping under high pump power. Moreover, self-starting mode-locking operation has been realized when the pump power was only 520 mW, which might benefit from the appropriate polarization conditions and small spectral filter separation. The laser can generate 1.89-nJ ultra-short pulses with 20-dB spectral width of 54.6 nm. The pulse duration can be compressed externally to 64.69 fs with the peak power of 21.3 kW.
description: 7 pages, 6 figures
Intrinsic ferromagnetism and restrictive thermodynamic stability in MA$_2$N$_4$ and Janus VSiGeN$_4$ monolayers
Creators: name: Dey, Dibyendu
name: Ray, Avijeet
name: Yu, Liping
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The seminal experimental discovery of the remarkably stable MoSi$_2$N$_4$ monolayer has led to a handful of predicted magnetic two-dimensional (2D) materials in the MA$_2$Z$_4$ family (M = transition metals, A = Si, Ge, and Z = N, P, As). These magnetic monolayers were predicted to be dynamically stable, but none of them has been synthesized to date. In this Research Letter, from first-principles thermodynamic stability analysis, we demonstrate that only the nitrides are thermodynamically stable and this occurs under N-rich conditions. Based on this finding, we propose two ferromagnetic, semiconducting Janus monolayers in the family: VSiGeN$_4$ and VSiSnN$_4$. They are both dynamically and thermally stable, but only the former is thermodynamically stable. Intriguingly, Janus VSiGeN$_4$ and VSiSnN$_4$ monolayers show weak in-plane anisotropy compared with the VSi$_2$N$_4$ monolayer. These two emerging Janus magnetic semiconductors offer opportunities for studying 2D magnetism and spin control for spintronics applications.
description: Main article - 7 pages, 5 figures. Supplemental Material added
Times Mirror Poll # 1992-NII0893: August News Interest Index
Creators: name: Times Mirror Center For The People & The Press
Publisher: name: Roper Center for Public Opinion Research
Year: 2013

description: Bill Clinton job performance (5); U.S. House of Representative job performance (1); following of news stories (13); coverage of news stories (1); press job performance (2); fairness of news organizations to the Clinton administration (2); cooperation between Republicans & Democrats in Washington (1); most important accomplishment of President Clinton so far (1); importance of action of the Clinton administration (8); Bill Clinton's economic plan (3); President Clinton's reduction of the ban on homosexuals in the military (1); homosexuality (2); impressions of Bill Clinton (7); areas of competition/rivalry among high-ranking people (1); vote in 1992 Presidential election (1).
Times Mirror Poll # 1993-NII0993: September News Interest Index
Creators: name: Times Mirror Center For The People & The Press
Publisher: name: Roper Center for Public Opinion Research
Year: 2006

description: President Bill Clinton job performance (1); attention to news coverage (4); National Service Act (1); Clinton health care reforms (8); most influence on heath care (2); NAFTA Free Trade Agreement (7); confidence in public figures and organizations (1); knowledge of phrases and themes (1); attention to political radio shows (1); opinion expression to Senator or Congressional Representative (1).
O dia-a-dia de uma Urgência Pediátrica
Creators: name: Caldeira, Teresa
name: Santos, Gina
name: Pontes, Etelvina
name: Dourado, Rui
name: Rodrigues, Lúcia
Publisher: name: Portuguese Journal of Pediatrics
Year: 2014

description: Objectivos: Verificar a adequação do recurso à urgência pediátrica num hospital de apoio perinatal diferenciado da região do Grande Porto, nos dias 4 de Fevereiro e 9 de Setembro de 2003.

Metodologia: Foram revistas as fichas de admissão e analisadas variáveis epidemiológicas, modo e hora de admissão, diagnósticos, exames auxiliares e tratamentos efectuados, orientação, e factores relacionados com procura inadequada.

Resultados: Recorreram ao serviço de urgência pediátrica (SU) nos dias estudados 231 crianças. Das crianças admitidas, 123 (53,2%) eram do sexo masculino; a mediana para a idade foi de 3 anos. O recurso ao SU foi em 81,8% dos casos por iniciativa própria e apenas 14,7% das crianças vinham referenciadas. Registou-se um pico de afluência entre as 19:30h e as 23:30h. Os diagnósticos mais frequentes foram: infecção das vias aéreas superiores (19,0%), dificuldade respiratória (16,5%), traumatismos, intoxicações e queimaduras (15,6%), gastrenterite aguda (12,6%) e febre sem foco (11,3%). Um terço das crianças não realizou qualquer exame auxiliar de diagnóstico ou terapêutica; 84,4% teve alta do serviço de urgência, mais de metade delas sem qualquer medicação. A procura do SU foi considerada inadequada, segundo os critérios de urgência hospitalar da OMS, em 58,4% dos doentes, o que se relacionou com: recorrer por iniciativa própria, idade inferior a 6 anos, evolução dos sintomas superior a 24 horas e admissão após as 23 horas.

Conclusão: Verificou-se neste estudo uma elevada proporção de situações não urgentes ou que constituem urgências extrahospitalares, evidenciando a necessidade de reforço dos cuidados de saúde primários com meios materiais e humanos (nomeadamente pediatra de ambulatório), e de implementação de companhas de sensibilização e educação para a saúde, de forma a optimizar a utilização do SU pediátrico por parte dos utentes.
description: Portuguese Journal of Pediatrics, Vol 37 No 1 (2006)
Presidential Performance in Foreign Affairs Survey: October, 1992.
Creators: name: Office Of The Technical Advisor To The President Of Mexico
Publisher: name: Roper Center for Public Opinion Research
Year: 1997

description: Level of awareness of presidential visit to the United States(4); presidential job performance during the visit(2); evaluation of NAFTA(12); presidential job performance(2); candidate preference for 1988 presidential election(1); monetary reform(2); demographics(8).
Superradiant Quantum Phase transition for Landau Polaritons with Rashba and Zeeman couplings
Creators: name: Manzanares, Guillaume
name: Champel, Thierry
name: Basko, Denis
name: Nataf, Pierre
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We develop a theory of cavity quantum electrodynamics for a two-dimensional electron gas in the presence of Rashba spin-orbit and Zeeman couplings and perpendicular magnetic field, coupled to a spatially nonuniform quantum photon field. We show that the superradiant quantum phase transition (SQPT), also known as photon condensation, can in principle occur through a pure in-plane Zeeman coupling, but it requires extremely small (unrealistic) quantum well widths or extremely fine tuning of the effective Landé factor which makes two Landau levels coincide. Landau level crossings can also be induced by the Rashba spin-orbit coupling and they promote the SQPT which can be obtained for certain values of the effective Landé factor and filling factors.
description: 11 pages, 5 figures
Sonnenfleckenzeichnung Nr. 32.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 07.02.1966, erstellt von Araldo Pittini, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1966

description: Bleistiftzeichnung mit Tinte und Farbstift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf dem Vordruck der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert
description: ETH-Bibliothek
Infecções urinárias diagnosticadas num Serviço de Urgência:  dados microbiológicos e implicações na terapêutica e profilaxia
Creators: name: Rodrigues, Fernanda
name: Alves, Ana Florinda
name: Lemos, Luís
Publisher: name: Portuguese Journal of Pediatrics
Year: 2014

description: Introdução: A terapêutica antibiótica nas infecções urinárias (IU) é iniciada de modo empírico, tendo em conta as bactérias mais frequentemente isoladas e as respectivas susceptibilidades aos antibióticos. A vigilância institucional contínua é indispensável para que as propostas terapêuticas iniciais possam ter maior probabilidade de eficácia.

Objectivo: Analisar a susceptibilidade das bactérias responsáveis por IU diagnosticadas no nosso Serviço de Urgência (SU).

Material e Métodos: Análise retrospectiva das bactérias isoladas nas IU diagnosticadas no SU em 2003 e 2004 e respectivos antibiogramas.

Resultados: Os germens mais frequentemente isolados foram E. coli (550 casos, 72%), P. mirabilis (115, 15%) e E. faecalis (42, 5.5%). Os dados microbiológicos revelam que a susceptibilidade das duas bactérias mais frequentes (E. coli e P. mirabilis) é muito boa e em valores equivalentes (97 e 98%) para o cefuroxime e para a associação amoxicilina com ácido clavulânico.

Conclusão: O cefuroxime e a amoxicilina com ácido clavulânico são, na nossa experiência, os melhores antibióticos para a terapêutica empírica das IU. A eficácia dos fármacos habitualmente usados na profilaxia pode não ter a eficácia pretendida.
description: Portuguese Journal of Pediatrics, Vol 37 No 1 (2006)
Curvature squared action in four dimensional $N=2$ supergravity using the dilaton Weyl multiplet
Creators: name: Mishra, Madhu
name: Sahoo, Bindusar
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper we derive the most general curvature squared action coupled to an arbitrary number of vector multiplets in four dimensional $N=2$ supergravity using the dilaton Weyl multiplet. The action that we derive is encoded in a single holomorphic prepotential.
description: 40 Pages Latex, minor changes
Recomendações para a vacinação contra o vírus da hepatite A
Creators: name: Antunes, Henedina
Publisher: name: Portuguese Journal of Pediatrics
Year: 2014

description: A hepatite A é a causa mais frequente de hepatite aguda no mundo. A infecção pelo vírus da hepatite A (VHA) na criança é geralmente benigna e muitas vezes assintomática, sendo a prevalência de falência hepática aguda inferior a 1/1000 casos1,2. No adulto e em determinados grupos de risco, a doença pode no entanto, ter importante morbilidade e até mortalidade significativas3,4.

A transmissão do VHA faz-se quase exclusivamente por via fecal-oral pelo que a melhoria do saneamento e higiene, mesmo sem recurso à vacinação, pode diminuir drasticamente a endemicidade para o VHA5-7. A prevalência de seropositividade para o VHA tornou-se assim um marcador das condições sanitárias de um país.
description: Portuguese Journal of Pediatrics, Vol 38 No 6 (2007)
Sonnenfleckenzeichnung Nr. 99.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 28.04.1966, erstellt von Araldo Pittini, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1966

description: Bleistiftzeichnung mit Tinte und Farbstift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf dem Vordruck der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert
description: ETH-Bibliothek
KLARpsy-Text: Verändert die Stimulation des Vagusnervs die Herzratenvariabilität (HRV) bei gesunden Menschen?
Creators: name: ZPID
Publisher: name: KLARpsy
Year: 2024
Subjects: subject: 150

description: Dieser KLARpsy-Text hat den Titel "Verändert die Stimulation des Vagusnervs die Herzratenvariabilität (HRV) bei gesunden Menschen?". Er wurde von Mitarbeitenden des Leibniz-Instituts für Psychologie verfasst. Eine anonyme testlesende Person war beteiligt. Der KLARpsy-Text befasst sich mit folgenden Inhalten: Es gibt bereits viele Studien zur Wirksamkeit einer elektrischen Stimulation des Vagusnervs über die Ohren. Dabei führt medizinisches Fachpersonal mit zertifizierten medizinischen Geräten die Stimulation durch. Unter solchen kontrollierten Bedingungen hat die Stimulation eine positive Wirkung etwa bei Epilepsie oder Depression. Damit die Ergebnisse solcher Studien möglichst genau sind, ist es wichtig zu wissen, wie man die Wirkung der Stimulation am besten messen kann. Ein körperlicher Hinweis für die Wirkung der Stimulation könnte die Herzratenvariabilität (kurz: HRV) sein. Das ist ein Maß dafür, wie stark der zeitliche Abstand zwischen Herzschlägen schwankt. Eine höhere HRV deutet auf eine bessere körperliche und seelische Gesundheit hin. Sie kann ein Zeichen für Entspannung sein. Mit ihrer Übersichtsarbeit wollten die Forschenden herausfinden: Erhöht die elektrische Stimulation des Vagusnervs über die Ohren die HRV bei gesunden Menschen im Vergleich zu einer vorgetäuschten oder keiner Stimulation? Die elektrische Stimulation des Vagusnervs über die Ohren verändert die Herzratenvariabilität (kurz: HRV) bei gesunden Menschen nicht. Im Vergleich zu einer vorgetäuschten oder keiner Stimulation zeigt sich kein bedeutsamer Unterschied.
The U.S. Naval Observatory VLBI Spectroscopic Catalog
Creators: name: Sexton, Remington O.
name: Secrest, Nathan J.
name: Johnson, Megan C.
name: Dorland, Bryan N.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Despite their importance for astrometry and navigation, the active galactic nuclei (AGNs) that comprise the International Celestial Reference Frame (ICRF) are relatively poorly understood, with key information such as their spectroscopic redshifts, AGN spectral type, and emission/absorption line properties generally missing from the literature. Using updated, publicly available, state-of-the-art spectroscopic fitting code optimized for the spectra of AGNs from low to high redshift, we present a catalog of emission line and spectral continuum parameters for 1,014 unique ICRF3 objects with single-fiber spectra from the Sloan Digital Sky Survey DR16. We additionally present black hole virial mass scaling relationships that use H$α$-, H$β$-, Mg II-, and C IV-based line widths, all consistent with each other, which can be used in studies of radio-loud objects across a wide range of redshifts, and we use these scaling relationships to provide derived properties such as black hole masses and bolometric luminosities for the catalog. We briefly comment on these properties for the ICRF objects, as well as their overall spectroscopic characteristics.
description: 40 pages, 19 figures, 6 tables. Accepted for publication in ApJS on 23 March 2022
Error bounds revisited
Creators: name: Cuong, Nguyen Duy
name: Kruger, Alexander Y.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: We propose a unifying general framework of quantitative primal and dual sufficient and necessary error bound conditions covering linear and nonlinear, local and global settings. The function is not assumed to possess any particular structure apart from the standard assumptions of lower semicontinuity in the case of sufficient conditions and (in some cases) convexity in the case of necessary conditions. We expose the roles of the assumptions involved in the error bound assertions, in particular, on the underlying space: general metric, normed, Banach or Asplund. Employing special collections of slope operators, we introduce a succinct form of sufficient error bound conditions, which allows one to combine in a single statement several different assertions: nonlocal and local primal space conditions in complete metric spaces, and subdifferential conditions in Banach and Asplund spaces.
description: 27 pages
Direct Photons in Hydrodynamic Modeling of Relativistic Nuclear Collisions
Creators: name: Monnai, Akihiko
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We review direct photons in the phenomenology of nuclear collisions at relativistic energies. Direct photons carry information about the space-time evolution of nuclear collisions because the QCD medium is transparent against colorless particles. After a status summary of theoretical and experimental studies, transverse momentum spectra and azimuthal momentum anisotropies of direct photons are studied in the context of the hydrodynamic modeling of relativistic nuclear collisions with emphasis on pre-equilibrium photons. It is implied that pre-equilibrium photons can be as important as thermal and prompt photons for comprehensive understanding of direct photon production.
description: 26 pages, 9 figures; Preprint of an invited review submitted to International Journal of Modern Physics A
SISA – Simple Interactive Statistical Analysis
Creators: name: Virella, Daniel
Publisher: name: Portuguese Journal of Pediatrics
Year: 2014

description: SISA (http://home.clara.net/sisa.htm) é um sítio de acesso livre e gratuito que permite realizar análises estatísticas directamente na Internet. É disponibilizado pela empresa holandesa Quantitative Skills, que tem uma ampla experiência de consultoria e apoio estatístico e de investigação em geral, a organizações governamentais das áreas da saúde e dos serviços sociais. A qualidade deste sítio foi reconhecida em 2000, ao ser-lhe outorgado o prémio Psychological Science Award. O programa on-line inclui a realização de uma ampla gama de acções: cálculos (dimensão de amostras, potência e significância de análises, intervalos de confiança de taxas de prevalência, tabelas de números aleatórios, agrupamentos, ordenações e distribuições de indivíduos, entre outros), testes estatísticos (análise de tabelas de contingência, teste t e outros testes paramétricos, correlações, testes não paramétricos e análise da efectividade de testes diagnósticos, etc.) e análise de distribuições de variáveis.
description: Portuguese Journal of Pediatrics, Vol 38 No 6 (2007)
Experimental Validation of Fully Quantum Fluctuation Theorems Using Dynamic Bayesian Networks
Creators: name: Micadei, Kaonan
name: Peterson, John P. S.
name: Souza, Alexandre M.
name: Sarthour, Roberto S.
name: Oliveira, Ivan S.
name: Landi, Gabriel T.
name: Serra, Roberto M.
name: Lutz, Eric
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Fluctuation theorems are fundamental extensions of the second law of thermodynamics for small systems. Their general validity arbitrarily far from equilibrium makes them invaluable in nonequilibrium physics. So far, experimental studies of quantum fluctuation relations do not account for quantum correlations and quantum coherence, two essential quantum properties. We here experimentally verify detailed and integral fully quantum fluctuation theorems for heat exchange using two quantum-correlated thermal spins-1/2 in a nuclear magnetic resonance setup. We confirm, in particular, individual integral fluctuation relations for quantum correlations and quantum coherence, as well as for the sum of all quantum contributions. These refined formulations of the second law are important for the investigation of fully quantum features in nonequilibrium thermodynamics.
8º Congresso Nacional de Pediatria - O Congresso da Criança - Suplemento I
Creators: name: Acta Pediátrica Portuguesa, APP
Publisher: name: Portuguese Journal of Pediatrics
Year: 2014

description: Portuguese Journal of Pediatrics, Vol 38 (2007): 8º Congresso Nacional de Pediatria - O Congresso da Criança - Suplemento I
Configuring Test Generators using Bug Reports: A Case Study of GCC Compiler and Csmith
Creators: name: Rabin, Md Rafiqul Islam
name: Alipour, Mohammad Amin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Software Engineering (cs.SE)
subject: Machine Learning (cs.LG)
subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences

description: The correctness of compilers is instrumental in the safety and reliability of other software systems, as bugs in compilers can produce executables that do not reflect the intent of programmers. Such errors are difficult to identify and debug. Random test program generators are commonly used in testing compilers, and they have been effective in uncovering bugs. However, the problem of guiding these test generators to produce test programs that are more likely to find bugs remains challenging. In this paper, we use the code snippets in the bug reports to guide the test generation. The main idea of this work is to extract insights from the bug reports about the language features that are more prone to inadequate implementation and using the insights to guide the test generators. We use the GCC C compiler to evaluate the effectiveness of this approach. In particular, we first cluster the test programs in the GCC bugs reports based on their features. We then use the centroids of the clusters to compute configurations for Csmith, a popular test generator for C compilers. We evaluated this approach on eight versions of GCC and found that our approach provides higher coverage and triggers more miscompilation failures than the state-of-the-art test generation techniques for GCC.
description: The 36th ACM/SIGAPP Symposium on Applied Computing, Software Verification and Testing Track (SAC-SVT'21)
NuSTAR Observations of 52 Compton-thick Active Galactic Nuclei Selected by the Swift/BAT All-sky Hard X-Ray Survey
Creators: name: Tanimoto, Atsushi
name: Ueda, Yoshihiro
name: Odaka, Hirokazu
name: Yamada, Satoshi
name: Ricci, Claudio
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the systematic broadband X-ray spectral analysis of 52 Compton-thick ($24 \leq \log N_{\mathrm{H}}^{\mathrm{LOS}}/\mathrm{cm}^{-2}$) active galactic nucleus (CTAGN) candidates selected by the Swift/BAT all-sky hard X-ray survey observed with Chandra, XMM--Newton, Swift/XRT, Suzaku, and NuSTAR. The XMM--Newton data of 10 objects and the NuSTAR data of 15 objects are published for the first time. We use an X-ray spectral model from a clumpy torus (XClumpy) to determine the torus properties. As a result, the hydrogen column density along the line of sight $N_{\mathrm{H}}^{\mathrm{LOS}}$ obtained from the XClumpy model indicate that 24 objects are Compton-thin AGNs and 28 objects are Compton-thick AGNs in the 90\% confidence interval. The main reason is the difference in the torus model applied. The hydrogen column density along the equatorial direction $N_{\mathrm{H}}^{\mathrm{Equ}}$ of CTAGNs inferred from the XClumpy model is larger than that of less obscured AGNs. The Compton-thin torus covering factor $C_{22}$ obtained from the XClumpy model is consistent with that of Ricci et al. (2017) in the low Eddington ratio ($\log R_{\mathrm{Edd}} \leq -1.0$), whereas $C_{22}$ inferred from the XClumpy model is larger than that of Ricci et al. (2017) in the high Eddington ratio ($-1.0 \leq \log R_{\mathrm{Edd}}$). The average value of the Compton-thick torus covering factor $C_{24}$ obtained from the XClumpy model is $36_{-4}^{+4}$\%. This value is larger than that of Ricci et al. (2015) ($C_{24} \simeq 27_{-4}^{+4}$\%) based on the assumption that all AGNs have intrinsically the same torus structure. These results suggest that the structure of CTAGN may be intrinsically different from that of less obscured AGN.
description: 44 pages, 16 figures, accepted for publication in the Astrophysical Journal Supplement Series
Cryptoplax Blainville 1818
Creators: name: Dell'Angelo, Bruno
name: Landau, Bernard M.
name: Sosso, Maurizio
name: Taviani, Marco
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Polyplacophora
Chitonida
Cryptoplacidae
Cryptoplax

description: Genus Cryptoplax Blainville, 1818
Type species. Chiton larvaeformis Burrow, 1815, by subsequent designation (Gray 1821: 234).
Remarks. Cryptoplax occurs in tropical and subtropical waters of the Indo-Pacific. The genus extends back to the Miocene of Italy and Paratethys (Dell’Angelo et al. 2016; Dulai 2005), Indonesia, Fiji (Schwabe et al. 2008) and West Pacific Islands (Ladd 1966).
description: Published as part of Dell'Angelo, Bruno, Landau, Bernard M., Sosso, Maurizio & Taviani, Marco, 2020, Late Pleistocene Red Sea Mollusca: 1. Polyplacophora, pp. 401-449 in Zootaxa 4772 (3) on page 437, DOI: 10.11646/zootaxa.4772.3.1, http://zenodo.org/record/3819654
Casimir boundaries, monopoles, and deconfinement transition in 3+1 dimensional compact electrodynamics
Creators: name: Chernodub, M. N.
name: Goy, V. A.
name: Molochkov, A. V.
name: Tanashkin, A. S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Compact U(1) gauge theory in 3+1 dimensions possesses the confining phase, characterized by a linear raise of the potential between particles with opposite electric charges at sufficiently large inter-particle separation. The confinement is generated by condensation of Abelian monopoles at strong gauge coupling. We study the properties of monopoles and the deconfining order parameter in zero-temperature theory in the presence of ideally conducting parallel metallic boundaries (plates) usually associated with the Casimir effect. Using first-principle numerical simulations in compact U(1) lattice gauge theory, we show that as the distance between the plates diminishes, the vacuum in between the plates experiences a deconfining transition. The phase diagram in the space of the gauge coupling and the inter-plane distance is obtained.
description: 8 pages, 9 figures