cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Existence of an upper limit on the density of excitons in carbon nanotubes by diffusion-limited exciton-exciton annihilation: Experiment and theory
Creators: name: Murakami, Yoichi
name: Kono, Junichiro
Publisher: name: arXiv
Year: 2009
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Through an investigation of photoemission properties of highly-photoexcited single-walled carbon nanotubes, we demonstrate that there is an upper limit on the achievable excitonic density. As the intensity of optical excitation increases, all photoluminescence emission peaks arising from different chirality single-walled carbon nanotubes showed clear saturation in intensity. Each peak exhibited a saturation value that was independent of the excitation wavelength, indicating that there is an upper limit on the excitonic density for each nanotube species. We propose that this saturation behavior is a result of efficient exciton-exciton annihilation through which excitons decay non-radiatively. In order to explain the experimental results and obtain excitonic densities in the saturation regime, we have developed a model, taking into account the generation, diffusion-limited exciton-exciton annihilation, and spontaneous decays of one-dimensional excitons. Using the model, we were able to reproduce the experimentally obtained saturation curves under certain approximations, from which the excitonic densities were estimated. The validity of the model was confirmed through comparison with Monte Carlo simulations. Finally, we show that the conventional rate equation for exciton-exciton annihilation without taking into account exciton diffusion fails to fit the experimentally observed saturation behavior, especially at high excitonic densities.
description: 5 figures, 1 table
Unusual hyperfine interaction of Dirac electrons and NMR spectroscopy in graphene
Creators: name: Dóra, Balázs
name: Simon, Ferenc
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Theory of nuclear magnetic resonance (NMR) in graphene is presented. The canonical form of the electron-nucleus hyperfine interaction is strongly modified by the linear electronic dispersion. The NMR shift and spin-lattice relaxation time are calculated as function of temperature, chemical potential, and magnetic field and three distinct regimes are identified: Fermi-, Dirac-gas, and extreme quantum limit behaviors. A critical spectrometer assessment shows that NMR is within reach for fully 13C enriched graphene of reasonable size.
description: 5 pages, 3 figures
Dynamical Supersymmetry Breaking, with Flavor
Creators: name: Craig, Nathaniel
name: Essig, Rouven
name: Franco, Sebastian
name: Kachru, Shamit
name: Torroba, Gonzalo
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We explore calculable models with low-energy supersymmetry where the flavor hierarchy is generated by quark and lepton compositeness, and where the composites emerge from the same sector that dynamically breaks supersymmetry. The observed pattern of Standard Model fermion masses and mixings is obtained by identifying the various generations with composites of different dimension in the ultraviolet. These "single-sector" supersymmetry breaking models give rise to various spectra of soft masses which are, in many cases, quite distinct from what is commonly found in models of gauge or gravity mediation. In typical models which satisfy all flavor-changing neutral current constraints, both the first and second generation sparticles have masses of order 20 TeV, while the stop mass is near 1 TeV. In other cases, all sparticles obtain masses of order 1 TeV predominantly from gauge mediation, even though the first two generations are composite.
description: 41 pages, 2 figures. References and comments added. Note added
Creators: name: Rodionova, Kristina
name: Hilgers, Karl F.
name: Raffii-Tabrizi, Salman
name: Döllner, Johannes
name: Cordasic, Nada
name: Ott, Christian
name: Linz, Peter
name: Anna-Lena Karl
name: Schmieder, Roland E.
name: Schiffer, Mario
name: Amann, Kerstin
name: Veelken, Roland
name: Ditting, Tilmann
Publisher: name: figshare
Year: 2021
Subjects: subject: 110901 Autonomic Nervous System
subject: FOS: Clinical medicine
subject: 111601 Cell Physiology
subject: FOS: Basic medicine
subject: 110902 Cellular Nervous System
subject: 110999 Neurosciences not elsewhere classified
subject: 110312 Nephrology and Urology
subject: 110906 Sensory Systems

description: R1_F-00464-2020_Supplemental Material
Quantum mechanism helps agents combat "bad" social choice rules
Creators: name: Wu, Haoyang
Publisher: name: arXiv
Year: 2010
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum strategies have been successfully applied to game theory for years. However, as a reverse problem of game theory, the theory of mechanism design is ignored by physicists. In this paper, the theory of mechanism design is generalized to a quantum domain. The main result is that by virtue of a quantum mechanism, agents who satisfy a certain condition can combat "bad" social choice rules instead of being restricted by the traditional mechanism design theory.
description: 9 pages, 2 figures
Additional file 4 of Rescue therapy with inhaled nitric oxide and almitrine in COVID-19 patients with severe acute respiratory distress syndrome
Creators: name: Bagate, François
name: Tuffet, Samuel
name: Masi, Paul
name: Perier, François
name: Razazi, Keyvan
name: de Prost, Nicolas
name: Carteaux, Guillaume
name: Payen, Didier
name: Mekontso Dessap, Armand
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Medicine
subject: Molecular Biology
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Marine Biology
subject: Science Policy
subject: Hematology

description: Additional file 4: Table S3. Correlations between respiratory mechanics and oxygenation response to the combination of inhaled nitric oxide and almitrine in ten patients with severe acute respiratory distress syndrome secondary to coronavirus disease 2019.
Enabling shared perceptions between Virtual and Augmented Reality users
Creators: name: Strecker, Ralf
Publisher: name: Zenodo
Year: 2023
Subjects: Virtual Reality
Augmented Reality
Scene Understanding
Room Share
Shared Awareness
HoloLens

description: This thesis provides insight into a novel mode of communication by combining augmented and virtual reality. The author presents “See what I see”, an application prototype that can be used to share the physical environment of an AR user with one or more remotely located VR users. The local and remote user(s) are visualized as virtual avatars and can interact with each other in real-time through hand gestures and spatial annotations. The application has been evaluated technically and was found to perform well in real-time with bi-directional data rates between 400 and 500 kB/s. Furthermore, user tests have been conducted and participants reported a sense of togetherness and feeling present in the shared physical-virtual space. While specific use cases are discussed, this work is intended more as a general explorationof the technological capabilites.
Magnetically-Regulated Fragmentation Induced by Nonlinear Flows and Ambipolar Diffusion
Creators: name: Basu, Shantanu
name: Ciolek, Glenn E.
name: Dapp, Wolf
name: Wurster, James
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a parameter study of simulations of fragmentation regulated by gravity, magnetic fields, ambipolar diffusion, and nonlinear flows. The thin-sheet approximation is employed with periodic lateral boundary conditions, and the nonlinear flow field ("turbulence") is allowed to freely decay. In agreement with previous results in the literature, our results show that the onset of runaway collapse (formation of the first star) in subcritical clouds is significantly accelerated by nonlinear flows in which a large-scale wave mode dominates the power spectrum. In addition, we find that a power spectrum with equal energy on all scales also accelerates collapse, but by a lesser amount. For a highly super-Alfvenic initial velocity field with most power on the largest scales, the collapse occurs promptly during the initial compression wave. However, for trans-Alfvenic perturbations, a subcritical magnetic field causes a rebound from the initial compression, and the system undergoes several oscillations before runaway collapse occurs. Models that undergo prompt collapse have highly supersonic infall motions at the core boundaries. Cores in magnetically subcritical models with trans-Alfvenic initial perturbations also pick up significant systematic speeds by inheriting motions associated with magnetically-driven oscillations. Core mass distributions are much broader than in models with small-amplitude initial perturbations, although the disturbed structure of cores that form due to nonlinear flows does not guarantee subsequent monolithic collapse. Our simulations also demonstrate that significant power can (if present initially) be maintained with negligible dissipation in large-scale compressive modes of a magnetic thin sheet, in the limit of perfect flux freezing.
description: v2, 26 pages, 12 figures, to appear in New Astronomy, animations at http://www.astro.uwo.ca/~basu/pb.htm
On the semiclassical treatment of Hawking radiation
Creators: name: Menotti, Pietro
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In the context of the semiclassical treatment of Hawking radiation we prove the universality of the reduced canonical momentum for the system of a massive shell self gravitating in a spherical gravitational field within the Painlevé family of gauges. We show that one can construct modes which are regular on the horizon both by considering as hamiltonian the exterior boundary term and by using as hamiltonian the interior boundary term. The late time expansion is given in both approaches and their time Fourier expansion computed to reproduce the self reaction correction to the Hawking spectrum.
description: 18 pages, LaTeX, Corrected typos
Sum-product estimates for rational functions
Creators: name: Bukh, Boris
name: Tsimerman, Jacob
Publisher: name: arXiv
Year: 2010
Subjects: subject: Combinatorics (math.CO)
subject: Algebraic Geometry (math.AG)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 05E15, 11T23, 11B75, 14N10

description: We establish several sum-product estimates over finite fields that involve polynomials and rational functions. First, |f(A)+f(A)|+|AA| is substantially larger than |A| for an arbitrary polynomial f over F_p. Second, a characterization is given for the rational functions f and g for which |f(A)+f(A)|+|g(A,A)| can be as small as |A|, for large |A|. Third, we show that under mild conditions on f, |f(A,A)| is substantially larger than |A|, provided |A| is large. We also present a conjecture on what the general sum-product result should be.
description: 32 pages, small additions, several typos fixed
Grain Boundary Roughening Transitions
Creators: name: Chui, S. T.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We consider the roughening of small angle grain boundaries consisting of arrays of dislocations and found two transitions, corresponding to fluctuations of the dislocations along and perpendicular to the boundaries. The latter contributes to a large scale fluctuation of the orientation of the crystal but the former does not. The transition temperatures of these transitions are very different, with the latter occuring at a much higher temperature. Order of magnitude estimates of these temperatures are consistent with recent experimental results from elasticity and X-ray measurements in solid $^4$He.
Density matrix renormalization group approach to two-fluid open many-fermion systems
Creators: name: Rotureau, J.
name: Michel, N.
name: Nazarewicz, W.
name: Ploszajczak, M.
name: Dukelsky, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We have extended the density matrix renormalization group (DMRG) approach to two-fluid open many-fermion systems governed by complex-symmetric Hamiltonians. The applications are carried out for three- and four-nucleon (proton-neutron) systems within the Gamow Shell Model (GSM) in the complex-energy plane. We study necessary and sufficient conditions for the GSM+DMRG method to yield the correct ground state eigenvalue and discuss different truncation schemes within DMRG. The proposed approach will enable configuration interaction studies of weakly-bound and unbound strongly interacting complex systems which, because of a prohibitively large size of Fock space, cannot be treated by means of the direct diagonalization.
description: 13 pages, 15 figures
Filtering Microarray Correlations by Statistical Literature Analysis Yields Potential Hypotheses for Lactation Research
Creators: name: Ling, Maurice HT
name: Lefevre, Christophe
name: Nicholas, Kevin R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Digital Libraries (cs.DL)
subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: Our results demonstrated that a previously reported protein name co-occurrence method (5-mention PubGene) which was not based on a hypothesis testing framework, it is generally statistically more significant than the 99th percentile of Poisson distribution-based method of calculating co-occurrence. It agrees with previous methods using natural language processing to extract protein-protein interaction from text as more than 96% of the interactions found by natural language processing methods to overlap with the results from 5-mention PubGene method. However, less than 2% of the gene co-expressions analyzed by microarray were found from direct co-occurrence or interaction information extraction from the literature. At the same time, combining microarray and literature analyses, we derive a novel set of 7 potential functional protein-protein interactions that had not been previously described in the literature.
Conservation laws for self-adjoint first order evolution equations
Creators: name: Freire, Igor Leite
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 76M60, 58J70, 70G65

description: In this work we consider the problem on group classification and conservation laws of the general first order evolution equations. We obtain the subclasses of these general equations which are quasi-self-adjoint and self-adjoint. By using the recent Ibragimov's Theorem on conservation laws, we establish the conservation laws of the equations admiting self-adjoint equations. We illustrate our results applying them to the inviscid Burgers' equation. In particular an infinite number of new symmetries of these equations are found and their corresponding conservation laws are established.
description: This manuscript has been accepted for publication in Journal of Nonlinear Mathematical Physics
Flat 3-Brane with Tension in Cascading Gravity
Creators: name: de Rham, Claudia
name: Khoury, Justin
name: Tolley, Andrew J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In the Cascading Gravity brane-world scenario, our 3-brane lies within a succession of lower-codimension branes, each with their own induced gravity term, embedded into each other in a higher-dimensional space-time. In the 6+1-dimensional version of this scenario, we show that a 3-brane with tension remains flat, at least for sufficiently small tension that the weak-field approximation is valid. The bulk solution is nowhere singular and remains in the perturbative regime everywhere.
description: 4 pages, 3 figures. v2: version to appear in PRL
Evidence of Asymmetry in SN 2007rt, a Type IIn Supernova
Creators: name: Trundle, C.
name: Pastorello, A.
name: Benetti, S.
name: Kotak, R.
name: Valenti, S.
name: Agnoletto, I.
name: Bufano, F.
name: Dolci, M.
name: Elias-Rosa, N.
name: Greiner, T.
name: Hunter, D.
name: Keenan, F. P.
name: Lorenzi, V.
name: Maguire, K.
name: Taubenberger, S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: An optical photometric and spectroscopic analysis of the slowly-evolving Type IIn SN2007rt is presented, covering a duration of 481 days after discovery. Its earliest spectrum, taken approximately 100 days after the explosion epoch, indicates the presence of a dense circumstellar medium, with which the supernova ejecta is interacting. This is supported by the slowly-evolving light curve. A notable feature in the spectrum of SN 2007rt is the presence of a broad He I 5875 line, not usually detected in Type IIn supernovae. This may imply that the progenitor star has a high He/H ratio, having shed a significant portion of its hydrogen shell via mass-loss. An intermediate resolution spectrum reveals a narrow Halpha P-Cygni profile, the absorption component of which has a width of 128 km/s. This slow velocity suggests that the progenitor of SN 2007rt recently underwent mass-loss with wind speeds comparable to the lower limits of those detected in luminous blue variables. Asymmetries in the line profiles of H and He at early phases bears some resemblance to double-peaked features observed in a number of Ib/c spectra. These asymmetries may be indicative of an asymmetric or bipolar outflow or alternatively dust formation in the fast expanding ejecta. In addition, the late time spectrum, at over 240 days post-explosion, shows clear evidence for the presence of newly formed dust.
description: Submitted to A&A on 4/2/2009. Accepted by A&A on 17/5/2009.15 pages plus 3 pages of online material
Flavor Alignment via Shining in RS
Creators: name: Csaki, Csaba
name: Perez, Gilad
name: Surujon, Ze'ev
name: Weiler, Andreas
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a class of warped extra dimensional models whose flavor violating interactions are much suppressed compared to the usual anarchic case due to flavor alignment. Such suppression can be achieved in models where part of the global flavor symmetry is gauged in the bulk and broken in a controlled manner. We show that the bulk masses can be aligned with the down type Yukawa couplings by an appropriate choice of bulk flavon field representations and TeV brane dynamics. This alignment could reduce the flavor violating effects to levels which allow for a Kaluza-Klein scale as low as 2-3 TeV, making the model observable at the LHC. However, the up-type Yukawa couplings on the IR brane, which are bounded from below by recent bounds on CP violation in the D system, induce flavor misalignment radiatively. Off-diagonal down-type Yukawa couplings and kinetic mixings for the down quarks are both consequences of this effect. These radiative Yukawa corrections can be reduced by raising the flavon VEV on the IR brane (at the price of some moderate tuning), or by extending the Higgs sector. The flavor changing effects from the radiatively induced Yukawa mixing terms are at around the current upper experimental bounds. We also show the generic bounds on UV-brane induced flavor violating effects, and comment on possible additional flavor violations from bulk flavor gauge bosons and the bulk Yukawa scalars.
description: 28 pages
Financial rogue waves
Creators: name: Yan, Zhenya
Publisher: name: arXiv
Year: 2009
Subjects: subject: Pricing of Securities (q-fin.PR)
subject: Pattern Formation and Solitons (nlin.PS)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Computational Finance (q-fin.CP)
subject: FOS: Economics and business
subject: FOS: Physical sciences

description: The financial rogue waves are reported analytically in the nonlinear option pricing model due to Ivancevic, which is nonlinear wave alternative of the Black-Scholes model. These solutions may be used to describe the possible physical mechanisms for rogue wave phenomenon in financial markets and related fields.
description: 4 papges, 2 figures, Final version accepted in Commun. Theor. Phys., 2010
Multiuser Scheduling in a Markov-modeled Downlink using Randomly Delayed ARQ Feedback
Creators: name: Murugesan, Sugumar
name: Schniter, Philip
name: Shroff, Ness B.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Information Theory (cs.IT)
subject: Systems and Control (eess.SY)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: We focus on the downlink of a cellular system, which corresponds to the bulk of the data transfer in such wireless systems. We address the problem of opportunistic multiuser scheduling under imperfect channel state information, by exploiting the memory inherent in the channel. In our setting, the channel between the base station and each user is modeled by a two-state Markov chain and the scheduled user sends back an ARQ feedback signal that arrives at the scheduler with a random delay that is i.i.d across users and time. The scheduler indirectly estimates the channel via accumulated delayed-ARQ feedback and uses this information to make scheduling decisions. We formulate a throughput maximization problem as a partially observable Markov decision process (POMDP). For the case of two users in the system, we show that a greedy policy is sum throughput optimal for any distribution on the ARQ feedback delay. For the case of more than two users, we prove that the greedy policy is suboptimal and demonstrate, via numerical studies, that it has near optimal performance. We show that the greedy policy can be implemented by a simple algorithm that does not require the statistics of the underlying Markov channel or the ARQ feedback delay, thus making it robust against errors in system parameter estimation. Establishing an equivalence between the two-user system and a genie-aided system, we obtain a simple closed form expression for the sum capacity of the Markov-modeled downlink. We further derive inner and outer bounds on the capacity region of the Markov-modeled downlink and tighten these bounds for special cases of the system parameters.
description: Contains 22 pages, 6 figures and 8 tables; revised version including additional analytical and numerical results; work submitted, Feb 2010, to IEEE Transactions on Information Theory, revised April 2011; authors can be reached at sugumar.murugesan@asu.edu/schniter@ece.osu.edu/shroff@ece.osu.edu
title: К вопросу о влиянии экзогенных факторов (ртуть, свинец) на потери беременности ранних сроков
title: Influence of Exogenous Factors (Mercury, Lead) on Early Pregnancy Losses
Creators: name: Байбуз, Дмитрий Васильевич
name: Иванов, Максим Борисович
name: Рухляда, Николай Николаевич
name: Шахалиев, Рустам Алигисмет Оглы
name: Зубакина, Екатерина Александровна
name: Иваненко, Наталья Борисовна
name: Куликова, Наталья Владимировна
name: Байбуз, Полина Дмитриевна
Publisher: name: Издательский центр СурГУ
Year: 2021

description: Цель – определить возможную взаимосвязь содержания свинца и ртути в крови и потерь беременности на ранних сроках у женщин, проживающих в районе с высоким антропогенным загрязнением. Материал
и методы. На базе консультативно-диагностической поликлиники Научно-клинического центра токсикологии
им. акад. С. Н. Голикова Федерального медико-биологического агентства России в период с 2017 по 2019 г. были
получены для анализа методом случайной выборки образцы проб крови 67 женщин, разделенных на 2 группы.
У 22 пациенток из исследуемой группы установлена неразвивающаяся беременность, у 45 беременных из контрольной группы – благоприятный исход беременности. Результаты. При оценке уровня ртути у беременных
в исследуемой группе медиана показателя составила 0,925 мкг/л (IQR 0,640–1,55 мкг/л), а в группе контроля –
0,990 мкг/л (IQR 0,69–1,28 мкг/л), статистически значимых различий между группами не выявлено. При оценке
уровня свинца медиана показателя в исследуемой группе составила 80,0 мкг/мл (IQR 76,2–97,2 мкг/мл), в группе
контроля – 76,4 мкг/мл (IQR 69, –82,6 мкг/мл). Различия показателей были статистически значимы (р = 0,024).
description: The study aims to determine the possible connection between the lead and mercury content in blood and
early pregnancy losses in pregnant women living in an area with high anthropogenic pollution. Material and
methods. In the period from 2017 to 2019, random blood samples of 67 women, divided into two groups, are
obtained for analysis. The data is received from the Consultative and Diagnostic Polyclinic of the Golikov Research
Clinical Center of Toxicology under the Federal Medical Biological Agency, Saint Petersburg, Russia. In 22 patients
from the study group, a non-developing pregnancy is established, and 45 pregnant women from the control group
had favorable pregnancy outcomes. Results. During the assessment of the level of mercury in pregnant women
in the study group, the median indicator was 0.925 μg/l (IQR 0.640–1.55 μg/l), and in the control group, it was
0.990 μg/l (IQR 0.69–1.28 μg/l). There were no statistically significant differences between the groups. During the
assessment of the level of lead, the median indicator in the study group was 80.0 μg/ml (IQR 76.2–97.2 μg/ml), in
the control group it was 76.4 μg/ml (IQR 69, –82.6 μg/ml). The differences in indicators were statistically significant
(p = 0.024).
Manipulation of Semiclassical Photon States
Creators: name: VanValkenburgh, Michael
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 81V80 (Primary); 35Q60, 35S30 (Secondary)

description: Gabriel F. Calvo and Antonio Picon defined a class of operators, for use in quantum communication, that allows arbitrary manipulations of the three lowest two-dimensional Hermite-Gaussian modes {|0,0>,|1,0>,|0,1>}. Our paper continues the study of those operators, and our results fall into two categories. For one, we show that the generators of the operators have infinite deficiency indices, and we explicitly describe all self-adjoint realizations. And secondly we investigate semiclassical approximations of the propagators. The basic method is to start from a semiclassical Fourier integral operator ansatz and then construct approximate solutions of the corresponding evolution equations. In doing so, we give a complete description of the Hamilton flow, which in most cases is given by elliptic functions. We find that the semiclassical approximation behaves well when acting on sufficiently localized initial conditions, for example, finite sums of semiclassical Hermite-Gaussian modes, since near the origin the Hamilton trajectories trace out the bounded components of elliptic curves.
description: 30 pages, 3 figures. Small corrections, mostly in Section V. To appear in the Journal of Mathematical Physics
Chemical trend of exchange couplings in diluted magnetic II-VI semiconductors
Creators: name: Chanier, T.
name: Virot, F.
name: Hayn, R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We have calculated the chemical trend of magnetic exchange parameters ($J_{dd}$, $N α$, and $N β$) of Zn-based II-VI semiconductors ZnA (A=O, S, Se, and Te) doped with Co or Mn. We show that a proper treatment of electron correlations by the LSDA+$U$ method leads to good agreement between experimental and theoretical values of the nearest-neighbor exchange coupling $J_{dd}$ between localized 3$d$ spins in contrast to the LSDA method. The exchange couplings between localized spins and doped electrons in the conduction band $N α$ are in good agreement with experiment as well. But the values for $N β$ (coupling to doped holes in the valence band) indicate a cross-over from weak coupling (for A=Te and Se) to strong coupling (for A=O) and a localized hole state in ZnO:Mn. That hole localization explains the apparent discrepancy between photoemission and magneto-optical data for ZnO:Mn.
description: 19 pages, 4 figures
Hot spots and a clumpy disk: Variability of brown dwarfs and stars in the young Sigma Ori cluster
Creators: name: Scholz, Alexander
name: Xu, Xiaoying
name: Jayawardhana, Ray
name: Wood, Kenneth
name: Eisloeffel, Jochen
name: Quinn, Ciara
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The properties of accretion disks around stars and brown dwarfs in the SOri cluster (age 3 Myr) are studied based on NIR time series photometry supported by MIR spectral energy distributions. We monitor ~30 young low-mass sources over 8 nights in the J- and K-band using the duPont telescope at Las Campanas. We find three objects showing variability with J-band amplitudes >0.5 mag; five additional objects exhibit low-level variations. All three highly variable sources have been previously identified as highly variable; thus we establish the long-term nature of their flux changes. The lightcurves contain periodic components with timescales of ~0.5-8 days, but have additional irregular variations superimposed -- the characteristic behaviour for classical T Tauri stars. Based on the colour variability, we conclude that hot spots are the dominant cause of the variations in two objects, including one likely brown dwarf, with spot temperatures in the range of 6000-7000 K. For the third one (#2), a brown dwarf or very low mass star, inhomogenities at the inner edge of the disk are the likely origin of the variability. Based on mid-infrared data from Spitzer, we confirm that the three highly variable sources are surrounded by circum-(sub)-stellar disks. They show typical SEDs for T Tauri-like objects. Using SED models we infer an enhanced scaleheight in the disk for the object #2, which favours the detection of disk inhomogenities in lightcurves and is thus consistent with the information from variability. In the SOri cluster, about every fifth accreting low-mass object shows persistent high-level photometric variability. We demonstrate that estimates for fundamental parameters in such objects can be significantly improved by determining the extent and origin of the variations.
description: Accepted for publication in MNRAS. 16 pages, 8 figures, 1 appendix
Unobstructed K-deformations of Generalized Complex Structures and Bihermitian Structures
Creators: name: Goto, Ryushi
Publisher: name: arXiv
Year: 2009
Subjects: subject: Differential Geometry (math.DG)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 53C25, 53C55

description: We introduce K-deformations of generalized complex structures on a compact Kahler manifold $M=(X, J)$ with an effective anti-canonical divisor and show that obstructions to K-deformations of generalized complex structures on $M$ always vanish. Applying the stability theorem of generalized Kahler structures, together with unobstructed K-deformations, we construct deformations of bihermitian structures in the form $(J, J^-_t, h_t)$ on a compact Kahler surface with a non-zero holomorphic Poisson structure. Then we prove that a compact Kahler surface $S$ admits a non-trivial bihermitian structure if and only if $S$ has a non-zero holomorphic Poisson structure.
description: 38 pages, explanation improved, e.g., definition of bihermitian structures with the same orientation, added references
Additional file 1 of Treatment seeking behavior and associated factors of suspected dengue fever among Shan people in eastern Shan special region IV, Myanmar: a cross-sectional study
Creators: name: Liu, Hui
name: Xu, Jian-Wei
name: Ai, Zadan
name: Yu, Yan
name: Yu, Bian
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Science Policy
subject: Computational Biology

description: Additional file 1.
Spinors in euclidean field theory, complex structures and discrete symmetries
Creators: name: Wetterich, C.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We discuss fermions for arbitrary dimensions and signature of the metric, with special emphasis on euclidean space. Generalized Majorana spinors are defined for $d=2,3,4,8,9$ mod 8, independently of the signature. These objects permit a consistent analytic continuation of Majorana spinors in Min-kowski space to euclidean signature. Compatibility of charge conjugation with complex conjugation requires for euclidean signature a new complex structure which involves a reflection in euclidean time. The possible complex structures for Minkowski and euclidean signature can be understood in terms of a modulo two periodicity in the signature. The concepts of a real action and hermitean observables depend on the choice of the complex structure. For a real action the expectation values of all hermitean multi-fermion observables are real. This holds for arbitrary signature, including euclidean space. In particular, a chemical potential is compatible with a real action for the euclidean theory. We also discuss the discrete symmetries of parity, time reversal and charge conjugation for arbitrary dimension and signature.
description: extended version, detailed discussion of four-dimensional euclidean Majorana spinors, extended descripton of complex structures, discussion of chemical potential for euclidean fermions and reality of action, 70 pages
Additional file 1 of Rescue therapy with inhaled nitric oxide and almitrine in COVID-19 patients with severe acute respiratory distress syndrome
Creators: name: Bagate, François
name: Tuffet, Samuel
name: Masi, Paul
name: Perier, François
name: Razazi, Keyvan
name: de Prost, Nicolas
name: Carteaux, Guillaume
name: Payen, Didier
name: Mekontso Dessap, Armand
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Medicine
subject: Molecular Biology
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Marine Biology
subject: Science Policy
subject: Hematology

description: Additional file 1: Table S1. Blood gas before and after the last proning session in ten patients with severe acute respiratory distress syndrome secondary to coronavirus disease 2019.
Física e sociedade: a física médica e sua contribuição com o sistema de saúde
Creators: name: Mendes, JSD
Publisher: name: Zenodo
Year: 2021
Subjects: medical physics

description: As profissionais da física médica têm estado ativamente envolvidas no desenvolvimento da saúde por mais de cem anos. No entanto, a física médica enquanto um campo organizado é relativamente jovem e menos familiar que outras profissões da saúde. Até mesmo entre educadoras de física universitárias e pré-universitárias, pouco se sabe sobre as responsabilidades precisas do papel daquela profissão. Sendo assim, a intenção desta fala é discutir sua função com base em documentos oficiais nacionais e internacionais que a regem e desta forma, oferecer ferramentas de encorajamento para mais jovens agarrarem as oportunidades oferecidas por este campo altamente desafiador e de rápida expansão.
Drag Force of Moving Quark in STU Background
Creators: name: Sadeghi, J.
name: Setare, M. R.
name: Pourhassan, B.
name: Hashmatian, S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we consider a quark moving in D=5, ${\mathcal{N}}=2$ supergravity thermal plasma. By using three charge non-extremal black hole solution (STU solution) we calculate drag force on the quark and diffusion constant from $AdS$/CFT correspondence.
description: 13 pages, no figure
Polarimeters and Energy Spectrometers for the ILC Beam Delivery System
Creators: name: Boogert, S.
name: Hartin, A. F.
name: Hildreth, M.
name: Käfer, D.
name: List, J.
name: Maruyama, T.
name: Mönig, K.
name: Moffeit, K. C.
name: Moortgat-Pick, G.
name: Riemann, S.
name: Schreiber, H. J.
name: Schüler, P.
name: Torrence, E.
name: Woods, M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: Any future high energy e+e- linear collider aims at precision measurements of Standard Model quantities as well as of new, not yet discovered phenomena. In order to pursue this physics programme, excellent detectors at the interaction region have to be complemented by beam diagnostics of unprecedented precision. This article gives an overview of current plans and issues for polarimeters and energy spectrometers at the International Linear Collider, which have been designed to fulfill the precision goals at a large range of beam energies from 45.6 GeV at the Z pole up to 250 GeV or, as an upgrade, up to 500 GeV.
description: Reference paper for the "Letter of Intent" documents of all ILC detector concepts; 15 pages, 9 figures; as accepted by JINST. Improved figure quality and some changes to the text, but basic content unchanged
Quantum phase measurement and Gauss sum factorization of large integers in a superconducting circuit
Creators: name: Ng, H. T.
name: Nori, Franco
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the implementation of quantum phase measurement in a superconducting circuit, where two Josephson phase qubits are coupled to the photon field inside a resonator. We show that the relative phase of the superposition of two Fock states can be imprinted in one of the qubits. The qubit can thus be used to probe and store the quantum coherence of two distinguishable Fock states of the single-mode photon field inside the resonator. The effects of dissipation of the photon field on the phase detection are investigated. We find that the visibilities can be greatly enhanced if the Kerr nonlinearity is exploited. We also show that the phase measurement method can be used to perform the Gauss sum factorization of numbers (${\geq} 10^4$) into a product of prime integers, as well as to precisely measure both the resonator's frequency and the nonlinear interaction strength. The largest factorizable number is mainly limited by the coherence time. If the relaxation time of the resonator were to be ${\sim} 10$ $μ$s (${\sim} 1$ ms), then the largest factorizable number can be ${\geq} 10^4N$ (${\geq} 10^{7}N$), where $N$ is the number of photons in the resonator.
description: 13 pages, 5 figures
Additional file 2 of Treatment seeking behavior and associated factors of suspected dengue fever among Shan people in eastern Shan special region IV, Myanmar: a cross-sectional study
Creators: name: Liu, Hui
name: Xu, Jian-Wei
name: Ai, Zadan
name: Yu, Yan
name: Yu, Bian
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Science Policy
subject: Computational Biology

description: Additional file 2.
Global existence for a system of non-linear and non-local transport equations describing the dynamics of dislocation densities
Creators: name: Cannone, Marco
name: Hajj, Ahmad El
name: Monneau, Regis
name: Ribaud, Francis
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 54C70, 35L45, 35Q72, 74H20, 74H25

description: In this paper, we study the global in time existence problem for the Groma-Balogh model describing the dynamics of dislocation densities. This model is a two-dimensional model where the dislocation densities satisfy a system of transport equations such that the velocity vector field is the shear stress in the material, solving the equations of elasticity. This shear stress can be expressed as some Riesz transform of the dislocation densities. The main tool in the proof of this result is the existence of an entropy for this system
Additional file 5 of Broad humoral and cellular immunity elicited by one-dose mRNA vaccination 18 months after SARS-CoV-2 infection
Creators: name: Kang, Chang Kyung
name: Shin, Hyun Mu
name: Choe, Pyoeng Gyun
name: Park, Jiyoung
name: Hong, Jisu
name: Seo, Jung Seon
name: Lee, Yung Hie
name: Chang, Euijin
name: Kim, Nam Joong
name: Kim, Minji
name: Kim, Yong-Woo
name: Kim, Hang-Rae
name: Lee, Chang-Han
name: Seo, Jun-Young
name: Park, Wan Beom
name: Oh, Myoung-don
Publisher: name: figshare
Year: 2022
Subjects: subject: Immunology
subject: FOS: Clinical medicine

description: Additional file 5: Figure S4. Cytokine-producing T cells against wild-type SARS-CoV-2 and the Delta variant according to vaccination status after COVID-19. a CD4+ T-cell populations producing specific cytokines. b CD8+ T-cell populations producing specific cytokines. NS, not significant; IFN-γ, interferon- γ; IL, interleukin; TNF-α, tumor necrosis factor-α.
Quantum magnets with weakly confined spinons: Multiple length scales and quantum impurities
Creators: name: Doretto, R. L.
name: Vojta, Matthias
Publisher: name: arXiv
Year: 2009
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In magnets with strong quantum fluctuations, paramagnetic ground states with or without confinement of spinon excitations can be realized. Here we discuss the physics of the confined phase in the vicinity of a confinement--deconfinement transition: This regime, likely relevant to a multitude of frustrated spin systems, is characterized by multiple length scales: In addition to the magnetic correlation length, a confinement length can be defined, which can be probed, e.g., by local static measurements near non-magnetic impurities. We illustrate the ideas by explicit calculations for dimerized spin chains, but our qualitative results remain valid in higher dimensions as well. In particular, we study crossover from weak to strong confinement visible in the antiferromagnetic polarization cloud around a non-magnetic impurity. We also discuss the effective magnetic interaction between impurities, relevant for impurity-induced magnetic order, and consequences for nuclear magnetic resonance and neutron scattering experiments.
description: 16 pages, 15 figures, references added, final version
Z[1/p]-motivic resolution of singularities
Creators: name: Bondarko, Mikhail V.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Algebraic Geometry (math.AG)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics
subject: 32S45, 14C15, 14E15, 14F42, 14G17, 19E15, 14C25, 14F20, 18E40, 18E30, 13D15, 18G40, 19A99

description: The main goal of this paper is to deduce (from a recent resolution of singularities result of Gabber) the following fact: (effective) Chow motives with $Z[1/p]$-coefficients over a perfect field $k$ of characteristic $p$ generate the category $DM^{eff}_{gm}[1/p]$ (of effective geometric Voevodsky's motives with $Z[1/p]$-coefficients). It follows that $DM^{eff}_{gm}[1/p]$ could be endowed with a Chow weight structure $w_{Chow}$ whose heart is $Chow^{eff}[1/p]$ (weight structures were introduced in a preceding paper, where the existence of $w_{Chow}$ for $DM^{eff}_{gm}Q$ was also proved). As shown in previous papers, this statement immediately yields the existence of a conservative weight complex functor $DM^{eff}_{gm}[1/p]\to K^b(Chow^{eff}[1/p])$ (which induces an isomorphism on $K_0$-groups), as well as the existence of canonical and functorial (Chow)-weight spectral sequences and weight filtrations for any cohomology theory on $DM^{eff}_{gm}[1/p]$. We also define a certain Chow t-structure for $DM_{-}^{eff}[1/p]$ and relate it with unramified cohomology. To this end we study birational motives and birational homotopy invariant sheaves with transfers.
description: Some minor corrections made; to appear in Compositio Mathematica
A note on Hawking radiation via complex path analysis
Creators: name: Bhattacharya, Sourav
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: As long as we neglect backreaction, the Hawking temperature of a given black hole would not depend upon the parameters of the particle species we are considering. In the semiclassical complex path analysis approach of Hawking radiation, this has been verified by taking scalar and Dirac spinors separately for different stationary spacetime metrics. Here we show, in a coordinate independent way that, for an arbitrary spacetime with any number of dimensions, the equations of motion for a Dirac spinor, a vector, spin-$2$ and spin-$\frac{3}{2}$ fields reduce to Klein-Gordon equations in the WKB semiclassical limit. We then obtain, under some suitable assumptions, the complex solutions of those resulting scalar equations across the Killing horizon of a stationary spacetime to get a coordinate independent expression for the emission probability identical for all particle species. Finally we consider some explicit examples to demonstrate the validity of that expression.
description: 12 pages, v2; manuscript divided into sections, many discussions and references added
Controlled Manipulation of Individual Vortices in a Superconductor
Creators: name: Straver, E. W. J.
name: Hoffman, J. E.
name: Auslaender, O. M.
name: Rugar, D.
name: Moler, Kathryn A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report controlled local manipulation of single vortices by low temperature magnetic force microscope (MFM) in a thin film of superconducting Nb. We are able to position the vortices in arbitrary configurations and to measure the distribution of local depinning forces. This technique opens up new possibilities for the characterization and use of vortices in superconductors.