cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Covariant observables on a nonunimodular group
Creators: name: Kiukas, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 28C10 (Primary) 46G10 (Secondary)

description: It is shown that the characterization of covariant positive operator measures on nonunimodular locally compact groups can be obtained by using vector measure theoretic methods, without an application of Mackey's imprimitivity theorem.
description: 13 pages, to be published in Journal of Mathematical Analysis and Applications
How dark is the $ν_R$-philic dark photon?
Creators: name: Chauhan, Garv
name: Xu, Xun-Jie
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider a generic dark photon that arises from a hidden $U(1)$ gauge symmetry imposed on right-handed neutrinos ($ν_{R}$). Such a $ν_{R}$-philic dark photon is naturally dark due to the absence of tree-level couplings to normal matter. However, loop-induced couplings to charged leptons and quarks are inevitable, provided that $ν_{R}$ mix with left-handed neutrinos via Dirac mass terms. We investigate the loop-induced couplings and find that the $ν_{R}$-philic dark photon is not inaccessibly dark, which could be of potential importance to future dark photon searches at SHiP, FASER, Belle-II, LHC 14 TeV, etc.
description: 22 pages, 3 figures, 1 table, FASER bound updated, JHEP published version
Estimating the Spin of Stellar-Mass Black Holes via Spectral Fitting of the X-ray Continuum
Creators: name: Shafee, Rebecca
name: McClintock, Jeffrey E.
name: Narayan, Ramesh
name: Davis, Shane W.
name: Li, Li-Xin
name: Remillard, Ronald A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We fit X-ray spectral data in the thermal dominant or high soft state of two dynamically confirmed black holes, GRO J1655-40 and 4U 1543-47, and estimate the dimensionless spin parameters a* = a/M of the two holes. For GRO J1655-40, using a spectral hardening factor computed for a non-LTE relativistic accretion disk, we estimate a* ~ 0.75 and ~ 0.65-0.75, respectively, from ASCA and RXTE data. For 4U 1543-47, we estimate a* ~ 0.75-0.85 from RXTE data. Thus, neither black hole has a spin approaching the theoretical maximum a* = 1.
description: Accepted for publication in ApJ Letters, 13 pages, 3 figures; revised to include effects of power-law spectral component; spin estimates slightly lower
Screening anisotropy via energy-momentum squared gravity: $Λ$CDM model with hidden anisotropy
Creators: name: Akarsu, Ozgur
name: Barrow, John D.
name: Uzun, N. Merve
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct a generalization of the standard $Λ$CDM model, wherein we simultaneously replace the spatially flat Robertson-Walker metric with its simplest anisotropic generalization (LRS Bianchi I metric), and couple the cold dark matter to the gravity in accordance with the energy-momentum squared gravity (EMSG) of the form $f(T_{μν}T^{μν})\propto T_{μν}T^{μν}$. These two modifications -- namely, two new stiff fluid-like terms of different nature -- can mutually cancel out, i.e., the shear scalar can be screened completely, and reproduce mathematically exactly the same Friedmann equation of the standard $Λ$CDM model. This evades the BBN limits on the anisotropy, and thereby provides an opportunity to manipulate the cosmic microwave background quadrupole temperature fluctuation at the desired amount. We further discuss the consequences of the model on the very early times and far future of the Universe. This study presents also an example of that the EMSG of the form $f(T_{μν}T^{μν})\propto T_{μν}T^{μν}$, as well as similar type other constructions, is not necessarily relevant only to very early Universe but may even be considered in the context of a major problem of the current cosmology related to the present-day Universe, the so-called $H_0$ problem.
description: 11 pages, no figures and tables
Scaling and Goldstone effects in a QCD with two flavours of adjoint quarks
Creators: name: Engels, J.
name: Holtmann, S.
name: Schulze, T.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We study QCD with two Dirac fermions in the adjoint representation at finite temperature by Monte Carlo simulations.In such a theory the deconfinement and chiral phase transitions occur at different temperatures. We locate the second order chiral transition point at beta_c=5.624(2) and show that the scaling behaviour of the chiral condensate in the vicinity of beta_c is in full agreeement with that of the 3d O(2) universality class, and to a smaller extent comparable to the 3d O(6) class. From the previously determined first order deconfinement transition point beta_d=5.236(3) and the two-loop beta function we find the ratio T_c/T_d = 7.8(2). In the region between the two phase transitions we explicitly confirm the quark mass dependence of the chiral condensate which is expected due to the existence of Goldstone modes like in 3d O(N) spin models. At the deconfinement transition the condensate shows a gap, and below beta_d, it is nearly mass-independent for fixed beta.
description: 28 pages, 12 figures, Latex2e
A spectroscopic model for the low-lying electronic states of NO
Creators: name: Qu, Qianwei
name: Cooper, Bridgette
name: Yurchenko, Sergei N.
name: Tennyson, Jonathan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The rovibronic structure of A$^2Σ^+$, B$^2Π$ and C$^2Π$ states of nitric oxide (NO)is studied with the aim of producing comprehensive line lists for its near ultraviolet spectrum. Empirical energy levels for the three electronic states are determined using the a combination of the empirical MARVEL procedure and ab initio calculations, and the available experimental data are critically evaluated. Abinito methods which deal simultaneously with the Rydberg-like A$^2Σ^+$ and C$^2Π$, and the valence B$^2Π$ state are tested. Methods of modeling the sharp avoided crossing between the B$^2Π$ and C$^2Π$ states are tested. A rovibronic Hamiltonian matrix is constructed using variational nuclear motion program DUO whose eigenvalues are fitted to the MARVEL energy levels. The matrix also includes coupling terms obtained from the refinement of the ab initio potential energy and spin-orbit coupling curves. Calculated and observed energy levels agree well with each other, validating the applicability of our method and providing a useful model for this open shell system.
description: 14 pages
Light Deflection, Lensing, and Time Delays from Gravitational Potentials and Fermat's Principle in the Presence of a Cosmological Constant
Creators: name: Ishak, Mustapha
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The contribution of the cosmological constant to the deflection angle and the time delays are derived from the integration of the gravitational potential as well as from Fermat's Principle. The findings are in agreement with recent results using exact solutions to Einstein's equations and reproduce precisely the new $Λ$-term in the bending angle and the lens equation. The consequences on time delay expressions are explored. While it is known that $Λ$ contributes to the gravitational time delay, it is shown here that a new $Λ$-term appears in the geometrical time delay as well. Although these newly derived terms are perhaps small for current observations, they do not cancel out as previously claimed. Moreover, as shown before, at galaxy cluster scale, the $Λ$ contribution can be larger than the second-order term in the Einstein deflection angle for several cluster lens systems.
description: 6 pages, 1 figure, matches version published in PRD
Field theories with higher-group symmetry from composite currents
Creators: name: Brauner, Tomas
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Higher-form symmetries are associated with transformations that only act on extended objects, not on point particles. Typically, higher-form symmetries live alongside ordinary, point-particle (0-form), symmetries and they can be jointly described in terms of a direct product symmetry group. However, when the actions of 0-form and higher-form symmetries become entangled, a more general mathematical structure is required, related to higher categorical groups. Systems with continuous higher-group symmetry were previously constructed in a top-down manner, descending from quantum field theories with a specific mixed 't Hooft anomaly. I show that higher-group symmetry also naturally emerges from a bottom-up, low-energy perspective, when the physical system at hand contains at least two different given, spontaneously broken symmetries. This leads generically to a hierarchy of emergent higher-form symmetries, corresponding to the Grassmann algebra of topological currents of the theory, with an underlying higher-group structure. Examples of physical systems featuring such higher-group symmetry include superfluid mixtures and variants of axion electrodynamics.
description: 1+39 pages, 2 tables; v2: added a discussion of charged objects of composite symmetries and some extra references, version to appear in JHEP
Bicycle-Motor Vehicle Accidents in Kentucky
Creators: name: Agent, Kenneth R.
name: Zegeer, Charles V.
name: Deen, Robert C.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1980
Subjects: subject: Transportation Engineering

description: The purpose of this study was to determine the characteristics associated with bicycle related, motor-vehicle accidents in Kentucky. It was found that cyclists 10 to 14 years of age were involved in the largest number of motor-vehicle related accidents. Males were involved in four times as many accidents a s females. Most accidents occurred in urban areas, mostly on residential streets. The majority of accidents resulted from errors by the cyclists. The most common type was the right-angle accident, but the leading types varied with cyclist's age. Several factors were related to age and accident severity. The accidents were summarized by type and maneuver. The highest proportion was found between 3 and 7 p.m. Bicycle-related, motor-vehicle accidents represented under 10 percent of all injury-producing bicycle accidents.
Microscopic origin of reflection-asymmetric nuclear shapes
Creators: name: Chen, Mengzhi
name: Li, Tong
name: Dobaczewski, Jacek
name: Nazarewicz, Witold
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Background: The presence of nuclear ground states with stable reflection-asymmetric shapes is supported by rich experimental evidence. Theoretical surveys of odd-multipolarity deformations predict the existence of pear-shaped isotopes in several fairly localized regions of the nuclear landscape in the vicinity of near-lying single-particle shells with $Δ\ell=Δj=3$. Purpose: We analyze the role of isoscalar, isovector, neutron-proton, neutron-neutron, and proton-proton multipole interaction energies in inducing the onset of reflection-asymmetric ground-state deformations. Methods: The calculations are performed in the framework of axial reflection-asymmetric Hartree-Fock-Bogoliubov theory using two Skyrme energy density functionals and density-dependent pairing force. Results: We show that reflection-asymmetric ground-state shapes of atomic nuclei are driven by the odd-multipolarity neutron-proton (or isoscalar) part of the nuclear interaction energy. This result is consistent with the particle-vibration picture, in which the main driver of octupole instability is the isoscalar octupole-octupole interaction giving rise to large $E3$ polarizability.
description: 11 pages, 12 figures
The Ross classification as a tool for nursing evaluation in pediatric patient with heart disease.
Creators: name: Gatti, Chiara
name: Bardeggia, Valentina
name: Borgognoni, Cinzia
name: Bianco, Francesco
name: Guerra, Federico
Publisher: name: Journal of Biomedical Practitioners
Year: 2023

description: Background


Heart failure is a clinical syndrome following myocardial dysfunction with inadequate response to the body's metabolic demands. It appears more critical and complex in children than in adults. It is essential to treat this condition early: for this reason, the Ross classification was developed, which assigns a score to the patient based on the presented signs and symptoms.


Aims


The primary aim was to evaluate whether the data (signs, symptoms and behaviors of the child) collected non-invasively by the nurse were predictive of the risk of heart failure according to the Ross Classification in a cohort of pediatric patients after cardiac surgery for correction of atrial septal defect (ASD) or ventricular septal defect (VSD). The secondary aim was to correlate the trend of the scores obtained from the classification with variables such as hospitalization time (in days) and number of rehospitalizations.


Methods


Retrospective observational study conducted on a sample of medical and nursing records of patients between 0 and 18 years hospitalized at the Congenital Pediatric Cardiology and Heart Surgery - Pediatric Intensive Care Unit of Azienda Ospedaliero Universitaria delle Marche in 2021. A score was assigned according to the Ross Classification to each patient. A statistical analysis followed using Wizard and STATA software.


Results


Most of the patients belonged to the second class of Ross (51%), while none presented parameters included in the fourth class. It emerged that patients included in the second and third classes of Ross had a longer hospital stay than those who were included in the first class as well as a greater relative risk of total hospital stay. Hospitalizations involved 5% of the sample (3/57).


Conclusions


Nurse is fundamental in the detection of the parameters for the computation of the Ross classification in heart failure in pediatrics. In addition to the clinical-instrumental data, observation during feeding and the severity of the related respiratory distress is fundamental.


The creation of a multidisciplinary team that addresses every aspect related to heart failure allows an effective comparison between different health professionals and an excellent level of assistance.
description: Journal of Biomedical Practitioners, Vol. 7 No. 2 (2023)
Integrating the geodesic equations in the Schwarzschild and Kerr space-times using Beltrami's "geometrical" method
Creators: name: Boccaletti, Dino
name: Catoni, Francesco
name: Cannata, Roberto
name: Zampetti, Paolo
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We revisit a little known theorem due to Beltrami, through which the integration of the geodesic equations of a curved manifold is accomplished by a method which, even if inspired by the Hamilton-Jacobi method, is purely geometric. The application of this theorem to the Schwarzschild and Kerr metrics leads straightforwardly to the general solution of their geodesic equations. This way of dealing with the problem is, in our opinion, very much in keeping with the geometric spirit of general relativity. In fact, thanks to this theorem we can integrate the geodesic equations by a geometrical method and then verify that the classical conservation laws follow from these equations.
description: 12 pages; corrected typos, journal-ref added
Propagation of Traffic Noise
Creators: name: Agent, Kenneth R.
name: Zegeer, Charles V.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1980
Subjects: subject: Transportation Engineering

description: The effects of various traffic, ground cover, and geometric conditions on traffic noise propagation were evaluated in this study. There were two general methods of data collection. The first method consisted of using as many as four sound-level meters and graphic-level recorders to take simultaneous recordings of the traffic stream; the second method involved a constant noise source using a random noise generator.  The L1.0 noise level reduction per doubling of distance was found to increase substantially when the traffic volume was less than 1,000 vehicles per hour. Wind speed and direction were found to have a large effect on noise propagation. Ground cover was also found to have a definite effect. Data were taken on short grass, tall weeds, tali grass, average grass, pavement, gravel, smooth dirt, snow, and plowed field. The drop-off per doubling of distance was found to decrease from about 4.5 dBA for receiver heights of 10 feet (3m) or below to 3.0 dBA for heights above 10 feet (3m). At heights above 10 feet (3 m), the type of ground cover did not have a significant influence on the propagation loss. Noise attenuation per doubling of distance remained constant back to about 400 feet (122m) where the drop-offs were influenced by the ambient noise level. Individual noise readings indicated that noise propagation was influenced by vehicle type and speed. Noise drop-off was larger for smaller percentage levels, but the differences decreased as volumes increased. Source height was also found to have an effect on noise propagation.
Modulus and Damping of Asphaltic Concrete Using the Resonant Column
Creators: name: Allen, David L.
name: Deen, Robert C.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1980
Subjects: subject: Transportation Engineering

description: When analyzing flexible pavements or predicting their behavior by such means as elastic-layered theory or by finite elements, it is necessary to know the parameters that govern the behavior of the pavement components. One of the most important factors to consider is the modulus of the asphalt bound layers.  In the past two decades, one method that has seen increasing use in the determination of the moduli of engineering materials (particularly soils) is the resonant column. However, its use in determining the moduli cf asphaltic concrete has not been widespread or well documented. In this study, which was part of a larger study on pavement rutting (1), attempts have been made to adapt the resonant column to testing asphaltic concrete. A brief summary of resonant column theory and a discussion of equipment, problems, and results are presented.
Elicitation of evidentials and miratives
Creators: name: Parker, Verdena
name: Escamilla, Ramón
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: subject: hup

description: Audio file VP-310717-01a: Evidentials and miratives again; some general statements; story about Robbie hunting elk in Montana (in English), butchering, 23:00-end.
Properties of X-Ray Rich Gamma Ray Bursts and X-Ray Flashes detected with BeppoSAX and Hete-2
Creators: name: Alessio, V. D'
name: Piro, L.
name: Rossi, E. M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the spectrum of the prompt emission and the X-ray and optical afterglow fluxes of 54 X-Ray Rich Gamma Ray Burst (XRRs) and X-Ray Flashes (XRFs), observed by BeppoSax and HETE-2. A comparison is then performed with classical Gamma Ray Bursts (GRBs). The goal of this paper is to investigate the nature of XRRs/XRFs, as high redshift GRBs or off-axis GRBs, analyzing both their prompt and afterglow properties. We find that the XRR/XRF spectral indexes of the Band function are similar to those of classical GRBs, whereas the peak energy is lower by a factor of 4. We study the optical and X-Ray afterglow properties of the XRRs/XRFs; in particular we analyze the XRR 011030 afterglow. We find that the X-ray and optical flux distributions and the lightcurves of the XRRs/XRFs sample are consistent with those of classical GRBs; in particular, they show evidence of a break and no rising temporal slope. We compare these results with the afterglow predictions of the high redshift scenario, where XRFs are GRBs at higher redshift and of the off-axis scenario, where the observed differences are due to viewing angle effects. In this last framework, we consider jets with a homogeneous, a -2 power-law shaped and a Gaussian luminosity angular distribution. We find that the high redshift scenario can explain some events but not the total sample of XRRs/XRFs. The off-axis model may be consistent with our findings when a homogeneous jet is considered. However, given the uncertainties on the selection effects in our sample, a Gaussian jet viewed at small angles from the Gaussian core and a power-law shaped cannot be ruled out.
description: 18 pages, 12 color figures, 1 b/w figures, accepted to Astronomy and Astrophysics
An Atlas of MUSE Observations towards Twelve Massive Lensing Clusters
Creators: name: Richard, Johan
name: Claeyssens, Adélaïde
name: Lagattuta, David J.
name: Guaita, Lucia
name: Bauer, Franz E.
name: Pello, Roser
name: Carton, David
name: Bacon, Roland
name: Soucail, Geneviève
name: Lyon, Gonzalo Prieto
name: Kneib, Jean-Paul
name: Mahler, Guillaume
name: Clément, Benjamin
name: Mercier, Wilfried
name: Variu, Andrei
name: Tamone, Amélie
name: Ebeling, Harald
name: Schmidt, Kasper B.
name: Nanayakkara, Themiya
name: Maseda, Michael
name: Weilbacher, Peter M.
name: Bouché, Nicolas
name: Bouwens, Rychard J.
name: Wisotzki, Lutz
name: de la Vieuville, Geoffroy
name: Martinez, Johany
name: Patrício, Vera
name: -----
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Spectroscopic surveys of massive galaxy clusters reveal the properties of faint background galaxies, thanks to the magnification provided by strong gravitational lensing. We present a systematic analysis of integral-field-spectroscopy observations of 12 massive clusters, conducted with the Multi Unit Spectroscopic Explorer (MUSE). All data were taken under very good seeing conditions (0.6") in effective exposure times between two and 15 hrs per pointing, for a total of 125 hrs. Our observations cover a total solid angle of ~23 arcmin$^2$ in the direction of clusters, many of which were previously studied by the MACS, Frontier Fields, GLASS and CLASH programs. The achieved emission line detection limit at 5$σ$ for a point source varies between (0.77--1.5)$\times$10$^{-18}$ erg\,s$^{-1}$\,cm$^{-2}$ at 7000Å. We present our developed strategy to reduce these observational data, detect sources and determine their redshifts. We construct robust mass models for each cluster to further confirm our redshift measurements using strong-lensing constraints, and identify a total of 312 strongly lensed sources producing 939 multiple images. The final redshift catalogs contain more than 3300 robust redshifts, of which 40\% are for cluster members and $\sim$30\% for lensed Lyman-$α$ emitters. 14\% of all sources are line emitters not seen in the available HST images, even at the depth of the FFs ($\sim29$ AB). We find that the magnification distribution of the lensed sources in the high-magnification regime ($μ{=}$ 2--25) follows the theoretical expectation of $N(z)\proptoμ^{-2}$. The quality of this dataset, number of lensed sources, and number of strong-lensing constraints enables detailed studies of the physical properties of both the lensing cluster and the background galaxies. The full data products from this work are made available to the community. [abridged]
description: 47 pages, 13 figures, 18 tables. Accepted for publication in A&A. Data Release products available on CDS and at https://cral-perso.univ-lyon1.fr/labo/perso/johan.richard/MUSE_data_release
Notes on phase space quantization
Creators: name: Kiukas, J.
name: Lahti, P.
name: Ylinen, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider questions related to a quantization scheme in which a classical variable f:Ω\to R on a phase space Ωis associated with a semispectral measure E^f, such that the moment operators of E^f are required to be of the form Γ(f^k), with Γa suitable mapping from the set of classical variables to the set of (not necessarily bounded) operators in some Hilbert space. In particular, we investigate the situation where the map Γis implemented by the operator integral with respect to some fixed positive operator measure. The phase space Ωis first taken to be an abstract measurable space, then a locally compact unimodular group, and finally R^2, where we determine explicitly the relevant operators Γ(f^k) for certain variables f, in the case where the quantization map Γis implemented by a translation covariant positive operator measure. In addition, we consider the question under what conditions a positive operator measure is projection valued.
description: 21 pages, submitted to Journal of Mathematical Physics
La classificazione di Ross come strumento di valutazione infermieristica nel paziente pediatrico cardiopatico.
Creators: name: Gatti, Chiara
name: Bardeggia, Valentina
name: Borgognoni, Cinzia
name: Bianco, Francesco
name: Guerra, Federico
Publisher: name: Journal of Biomedical Practitioners
Year: 2023

description: Introduzione


L’Insufficienza cardiaca è una sindrome clinica che fa seguito a una disfunzione del miocardio con inadeguata risposta alle esigenze metaboliche dell’organismo. Essa appare più critica e complessa nei bambini rispetto agli adulti, per cui risulta fondamentale trattare precocemente questa condizione.


Uno strumento per il riconoscimento precoce di disfunzione miocardica è la Classificazione di Ross, che assegna un punteggio al paziente sulla base di segni e sintomi presentati.


Obiettivi


L’obiettivo principale dello studio è stato quello di valutare se i dati (segni, sintomi e comportamenti del bambino) rilevati in maniera non invasiva dall’infermiere fossero predittivi di rischio di scompenso cardiaco secondo la Classificazione di Ross in una coorte di pazienti pediatrici dopo intervento cardiochirurgico per correzione di difetto interatriale (DIA) o interventricolare (DIV).


L’obiettivo secondario è stato quello di correlare l’andamento dei punteggi ottenuti dal computo della classificazione con variabili quali tempo di degenza (in giornate) e numero di ri-ospedalizzazioni.


Metodi


Studio osservazionale retrospettivo condotto su un campione di cartelle cliniche integrate di pazienti tra 0 e 18 anni ricoverati presso la Cardiologia e Cardiochirurgia Pediatrica Congenita – Unità Terapia Intensiva Pediatrica dell’Azienda Ospedaliero Universitaria delle Marche nell’anno 2021.


È stato assegnato un punteggio in base alla Classificazione di Ross ad ogni paziente. È stata eseguita un’analisi statistica utilizzando i software Wizard e STATA.


Risultati


La maggior parte dei pazienti apparteneva alla seconda classe di Ross (51%), mentre nessuno presentava parametri inclusi nella quarta classe.


Dall’analisi dei dati raccolti dall’infermiere è emerso che i pazienti inseriti nelle classi seconda e terza di Ross hanno avuto un tempo di degenza più lungo rispetto a coloro che rientravano nella prima classe oltre che maggior rischio relativo di degenza totale ospedaliera.


Le riospedalizzazioni hanno coinvolto il 5% del campione, ovvero 3 su un totale di 57.


Conclusioni


La figura dell’infermiere risulta fondamentale nella rilevazione dei parametri per la computa della classificazione di Ross nello scompenso cardiaco in pediatria. Fondamentale, oltre ai dati clinico-strumentali, è l’osservazione durante l’alimentazione e la gravità del distress respiratorio ad essa correlato. La creazione di un gruppo multidisciplinare che affronti ogni aspetto correlato allo scompenso cardiaco permette un confronto efficace tra i diversi professionisti della salute e un livello di assistenza eccellente.
description: Journal of Biomedical Practitioners, Vol. 7 No. 2 (2023)
A self-similar dynamics in viscous spheres
Creators: name: Barreto, W.
name: Ovalle, J.
name: Rodriguez, B.
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the evolution of radiating and viscous fluid spheres assuming an additional homothetic symmetry on the spherically simmetric space--time. We match a very simple solution to the symmetry equations with the exterior one (Vaidya). We then obtain a system of two ordinary differential equations which rule the dynamics, and find a self--similar collapse which is shear--free and with a barotropic equation of state. Considering a huge set of initial self--similar dynamics states, we work out a model with an acceptable physical behavior.
description: 15 pages, 4 figures
Dessins d’enfants and genus zero actions
Creators: name: Duong, Linh Ton
Publisher: name: University of British Columbia
Year: 2009

description: A Dessin D'Enfant is a cellular map on a Riemann surface ramified over {0, 1, ∞}. We will describe Grothendieck's correspondence between the set of isomorphism classes of dessins and the set of ismorphism classes of algebraic curves defined over Q. We also describe the action of the Galois group of the algebraic numbers, Gal(Q/Q), on the dessins. Finally, we also talk about groups that admit genus zero actions on Riemann surfaces and investigate the nature of Belyi functions on these Riemann surfaces.
Pseudo Polynomial Size LP Formulation for Calculating the Least Core Value of Weighted Voting Games
Creators: name: Tanaka, Masato
name: Matsui, Tomomi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Science and Game Theory (cs.GT)
subject: FOS: Computer and information sciences
subject: 91B12, 90C05

description: In this paper, we propose a pseudo polynomial size LP formulation for finding a payoff vector in the least core of a weighted voting game. The numbers of variables and constraints in our formulation are both bounded by $\mbox{O}(n W_+)$, where $n$ is the number of players and $W_+$ is the total sum of (integer) voting weights. When we employ our formulation, a commercial LP solver calculates a payoff vector in the least core of practical weighted voting games in a few seconds. We also extend our approach to vector weighted voting games.
description: 14 pages, 1 figure
Photon-assistant Fano resonance in coupled multiple quantum dots
Creators: name: Xie, Wanyuan
name: Pan, Hui
name: Chu, Weidong
name: Zhang, Wei
name: Duan, Suqing
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Based on calculations of the electronic structure of coupled multiple quantum dots, we study systemically the transport properties of the system driven by an ac electric field. We find qualitative difference between transport properties of double coupled quantum dots (DQDs) and triple quantum dots. For both symmetrical and asymmetrical configurations of coupled DQDs, the field can induce the photon-assisted Fano resonances in current-AC frequency curve in parallel DQDs, and a symmetric resonance in serial DQDs. For serially coupled triple quantum dots(STQDs), it is found that the $Λ$-type energy level has remarkable impact on the transport properties. For an asymmetric (between left and right dots) configuration, there is a symmetric peak due to resonant photon induced mixing between left/right dot and middle dot. In the symmetric configuration, a Fano asymmetric line shape appears with the help of ``trapping dark state". Here the interesting coherent trapping phenomena, which usual appear in quantum optics, play an essential role in quantum electronic transport. We provide a clear physics picture for the Fano resonance and convenient ways to tune the Fano effects.
description: 7 pages, 5 figures
Steady-State Creep Analysis of Pressurized Pipe Weldments by Perturbation Method
Creators: name: Shutov, A.
name: Altenbach, H.
name: Naumenko, K.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Numerical Analysis (math.NA)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 74D10 (Primary); 74S05 (Secondary)

description: The stress analysis of pressurized circumferential pipe weldments under steady state creep is considered. The creep response of the material is governed by Norton's law. Numerical and analytical solutions are obtained by means of perturbation method, the unperturbed solution corresponds to the stress field in a homogeneous pipe. The correction terms are treated as stresses defined with the help of an auxiliary linear elastic problem. Exact expressions for jumps of hoop and radial stresses at the interface are obtained. The proposed technique essentially simplifies parametric analysis of multi-material components.
description: 17 pages, 6 figures
Spin-orbit-enhanced robustness of supercurrent in graphene/WS$_2$ Josephson junctions
Creators: name: Wakamura, T.
name: Wu, N. J.
name: Chepelianskii, A. D.
name: Guéron, S.
name: Och, M.
name: Ferrier, M.
name: Taniguchi, T.
name: Watanabe, K.
name: Mattevi, C.
name: Bouchiat, H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We demonstrate enhanced robustness of the supercurrent through graphene-based Josephson junctions in which strong spin-orbit interactions (SOIs) are induced. We compare the persistence of a supercurrent at high magnetic fields between Josephson junctions with graphene on hexagonal boron-nitride and graphene on WS$_2$, where strong SOIs are induced via the proximity effect. We find that in the shortest junctions both systems display signatures of induced superconductivity, characterized by a suppressed differential resistance at a low current, in magnetic fields up to 1 T. In longer junctions however, only graphene on WS$_2$ exhibits induced superconductivity features in such high magnetic fields, and they even persist up to 7 T. We argue that these robust superconducting signatures arise from quasi-ballistic edge states stabilized by the strong SOIs induced in graphene by WS$_2$.
description: 6 pages, 3 figures
Nurses and Medical Physics: an observational study on the knowledge of the physical basis of Medical Devices.
Creators: name: Stura, Ilaria
name: Guiot, Caterina
Publisher: name: Journal of Biomedical Practitioners
Year: 2023

description: BACKGROUND


In recent decades, nursing is increasingly considered as a scientific discipline. Subjects such as Medical Physics, Statistics, and scientific method are important in professional training. In particular, understanding the physical basis of medical devices, their elaborated parameters, the methods and how information reaches the nurse allows a more informed practice.


OBJECTIVES


Primary objective. Investigate nurses' knowledge of the physical basis of the used medical device.


Secondary objective. Investigate whether the qualification type (professional school, diploma, or degree), the years since the end of the study, age, or Italian regional origin can influence this knowledge.


METHODOLOGY


An observational study was conducted using an anonymous online questionnaire developed ad hoc and addressed to nurses working in Italy. The responses were analyzed with chi-square tests divided by type of studies, years since the end of the study, and Italian region of origin.


RESULTS


More than half of the interviewees were unable to give the correct answer on the functioning of the sphygmomanometer (54.3%) and phonendoscope (53.0%). ECG and oximeter are the most understood instruments (79.0 and 67.9% correct answers respectively). 45.7% of interviewed do not remember that one cubic centimeter (CC) and one milliliter (ml) have a conversion factor of 1. No differences were found by qualification type, years since the end of the study (considering both the median and a limit of 5 years for new graduates), age, and Italian region of work (p>0.05).


DISCUSSION and CONCLUSIONS


Knowledge of the physical basis of the used medical devices does not seem to degrade over time.  In the light of this, it would be more useful to consolidate these foundations in the three-year degree course of Nursing, rather than investing in post qualification courses. Such training, however, would be desirable to allow current professionals to fill the gaps emerged in this study.
description: Journal of Biomedical Practitioners, Vol. 7 No. 2 (2023)
Stability of atoms in the Brown-Ravenhall model
Creators: name: Morozov, Sergey
name: Vugalter, Semjon
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 81V70

description: We consider the Brown--Ravenhall model of a relativistic atom with N electrons and a nucleus of charge Z and prove the existence of an infinite number of discrete eigenvalues for N <= Z. As an intermediate result we prove a HVZ-type theorem for these systems.
description: 31 pages, accepted to "Annales Henry Poincare". The error in Lemma 3 of the previous version is corrected and the corresponding changes are done in the proof of Theorem 1
Gli Infermieri e la Fisica Medica: studio osservazionale sulle conoscenze delle basi fisiche degli strumenti elettromedicali.
Creators: name: Stura, Ilaria
name: Guiot, Caterina
Publisher: name: Journal of Biomedical Practitioners
Year: 2023

description: Background

L’infermieristica si è sempre più affermata, negli ultimi decenni, come disciplina scientifica. Sono dunque importanti, nella formazione professionale, materie quali la Fisica Medica, la Statistica e il generale l’approccio scientifico. In particolare, la comprensione delle basi fisiche degli strumenti elettromedicali, dei parametri analizzati, delle metodiche e del modo in cui le informazioni giungono all’infermiere, consente un approccio alla clinica più consapevole da parte del professionista.

Obiettivo

Obiettivo primario. Indagare la conoscenza delle basi fisiche degli strumenti utilizzati da parte degli infermieri. Obiettivo secondario. Indagare se il tipo di percorso di studi (scuola professionale, diploma o laurea), gli anni dalla fine dello studio, l’età o la provenienza regionale possano influire su queste conoscenze.

Materiali e metodi

è stato condotto uno studio osservazionale utilizzando un questionario online anonimo elaborato ad hoc e indirizzato a infermieri che operano nel territorio italiano. Le risposte sono state analizzate con test chi-quadro dividendo per tipo di studi, anni dalla fine dello studio e regione di provenienza.

Risultati

più della metà degli intervistati non ha saputo dare la risposta corretta sul funzionamento di sfigmomanometro (54.3%) e fonendoscopio (53.0%), mentre ECG e saturimetro sono gli strumenti più compresi (79.0 e 67.9% di risposte corrette rispettivamente). Il 45.7% non ricorda che CC e ml hanno un fattore 1 di conversione. Non sono state rilevate delle differenze per tipo di studio, anni dalla fine dello studio (considerando sia la mediana che un limite di 5 anni per i neolaureati), età e regione di lavoro (p>0.05).

Discussione e conclusioni

Le conoscenze delle basi fisiche degli strumenti utilizzati non sembrano degradare nel tempo; perciò, sarebbe più utile consolidare queste basi nel triennio di Infermieristica, piuttosto che investire in corsi aggiuntivi per laureati/diplomati. Tali corsi sarebbero però auspicabili per permettere agli attuali professionisti di colmare le lacune che sono emerse in questo studio.
description: Journal of Biomedical Practitioners, Vol. 7 No. 2 (2023)
T-junction ion trap array for two-dimensional ion shuttling, storage and manipulation
Creators: name: Hensinger, W. K.
name: Olmschenk, S.
name: Stick, D.
name: Hucul, D.
name: Yeo, M.
name: Acton, M.
name: Deslauriers, L.
name: Rabchuk, J.
name: Monroe, C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We demonstrate a two-dimensional 11-zone ion trap array, where individual laser-cooled atomic ions are stored, separated, shuttled, and swapped. The trap geometry consists of two linear rf ion trap sections that are joined at a 90 degree angle to form a T-shaped structure. We shuttle a single ion around the corners of the T-junction and swap the positions of two crystallized ions using voltage sequences designed to accommodate the nontrivial electrical potential near the junction. Full two-dimensional control of multiple ions demonstrated in this system may be crucial for the realization of scalable ion trap quantum computation and the implementation of quantum networks.
description: 3 pages, 5 figures
Neurophysiology Technologist in neurorehabilitation and scientific research: an observational study of employment on the Italian national territory.
Creators: name: Turco, Cristina
name: Zago, Sara
name: Cavinato, Marianna
Publisher: name: Journal of Biomedical Practitioners
Year: 2023

description: Introduction


The professional figure of the Neurophysiology Technologist (TNFP) has always been related to the diagnostic field. However, the number of technologists employed in the scientific research, or in the neurorehabilitation field, is increasing. Indeed, there are various brain stimulation methods used for neurorehabilitation which can be performed by the TNFP (repetitive Transcranial Magnetic Stimulation - rTMS, transcranial Direct Current Stimulation – tDCS). Furthermore, different recording techniques (Magnetoencephalography - MEG, high density Electroencephalogram - hd-EEG, BCI) allow this professional figure to be included in the field of scientific research.


Objective


This study aims to know the current state of employment of Italian TNFP in the neurorehabilitation and scientific research.


Materials and Methods


A questionnaire was distributed via e-mail by the Neurophysiology Technologists Registry (TSRM PSTRP Orders) and by the Italian Association of Neurophysiology Technologists (AITN) throughout the national territory.  


Results


49 of the 91 TNFP participants of the study, carry out activities in neurorehabilitation and/or scientific research. The largest number of participants, 19 out of 49 (39%) is employed in public facilities; the most frequent type of contract is permanent employment (32 technologists out of 49).  When asked about the training they received, 13 respondents out of 49 reported that their current place of employment did not provide an adequate training, 21 that they had limited training, 10 considered their training as sufficient, 5 answered that they had been adequately prepared during their university bachelor degree course.


Discussion


Most of the TNFP in the study work in public facilities. The data could indicate how the Italian National Health System is investing in neurorehabilitation and how the TNFP figures are increasingly involved in the scientific development. 66% of the TNFPs (32 technologists) are employed with a permanent contract, of these, 17 are working in Scientific Institues of Health Research and Development, affiliated to public or private: the employment of TNFP is becoming so significant as to lead the aforementioned centers to assign permanent contracts, rather than scholarships or project contracts. On the other hand, 69% (34 technologists) of the participants defined themselves as untrained or with limited grounding, respect to a possible future employment in the neurorehabilitation and/or research field.


Conclusion


The need of more training addressed to neurorehabilitation and research could upgrade Neurophysiology technologists’ skills and consequently increase job opportunities.
description: Journal of Biomedical Practitioners, Vol. 7 No. 2 (2023)
Theory of Domain Wall Dynamics under Current
Creators: name: Tatara, Gen
name: Kohno, Hiroshi
name: Shibata, Junya
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Microscopic theory of domain wall dynamics under electric current is reviewed. Domain wall is treated as rigid and planar. The spin-transfer torque and forces on the wall are derived based on the $s$-$d$ exchange interaction between localized spins and conduction electrons, treating non-adiabaticity expressed by the gauge field perturbatively. Effect of spin relaxation is also studied.
description: short review paper for J. Phys. Soc. Jpn., "Advances in Spintronics"
A Low-Complexity Method for Parameter Estimation of the Simplified Randles Circuit with Experimental Verification
Creators: name: Simić, Mitar
name: Stavrakis, Adrian K.
name: M. Stojanovic, Goran
Publisher: name: figshare
Year: 2022
Subjects: subject: 90699 Electrical and Electronic Engineering not elsewhere classified
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this paper we present a processing-efficient method for parameter estimation of a Randles circuit. As our approach is not iterative, it does not require for an initial guess of model parameters to be provided. The low-complexity of the provided set of closed-form expressions enables the implementation on microcontroller-based platforms. The presented approach is verified with simulations (using both noiseless data and data with noise) and with experimentally obtained data (Randles circuit made from discrete components; impedance of microfluidic platform for isomalt detection; impedance of Panasonic 18650PF Li-ion Battery). Additionally, it was implemented on a microcontroller board based on ATmega2560 microcontroller with available 256 kB of flash memory, 8 kB of SRAM and clock speed of 16 MHz. Reliable and accurate estimations of such implementations confirmed the suitability of this work for low-cost embedded hardware.