cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A note on the occurrence of Cyrtopodium paludicolum Hoehne (Cyrtopodiinae) in the Diamantino Plateau, Minas Gerais, Brazil
Creators: name: Menezes, Euler da Luz Fernandes
name: Giordani, Samuel Cunha Oliveira
name: Julia Viotti, Corrêa
name: Santos, Jussiara Dias dos
name: Silva, Celma Cristina
Publisher: name: Zenodo
Year: 2023

description: The genus Cyrtopodium comprises species that can exhibit epiphytic, rupicolous, and terrestrial habits. Although they have a wide distribution in the state of Minas Gerais, the occurrence of Cyrtopodium paludicolum Hoehne was unknown in the Diamantino Plateau, specifically in the municipality of Diamantina, until it was confirmed through field collections. This manuscript aims to present a note on this species’ new occurrence. The two fertile specimens found were collected in March, herborized, and deposited in Jeanine Felfili Dendrological Herbarium (HDJF) and Diamantina Herbarium (DIAM) of the Federal University of Jequitinhonha and Mucuri Valleys (UFVJM). Here you will find a picture of the species in its habitat, a map indicating the new record's location, its description, and a plate illustrating its floral segments. This finding is significant for redefining the species' distribution range, especially because it has been frequently targeted by local orchid collectors.
Electroproduction of Eta Mesons in the S11(1535) Resonance Region at High Momentum Transfer
Creators: name: Dalton, M. M.
name: Adams, G. S.
name: Ahmidouch, A.
name: Angelescu, T.
name: Arrington, J.
name: Asaturyan, R.
name: Baker, O. K.
name: Benmouna, N.
name: Bertoncini, C.
name: Boeglin, W. U.
name: Bosted, P. E.
name: Breuer, H.
name: Christy, M. E.
name: Connell, S. H.
name: Cui, Y.
name: Danagoulian, S.
name: Day, D.
name: Dodario, T.
name: Dunne, J. A.
name: Dutta, D.
name: Khayari, N. El
name: Ent, R.
name: Fenker, H. C.
name: Frolov, V. V.
name: Gan, L.
name: Gaskell, D.
name: Hafidi, K.
name: Hinton, W.
name: Holt, R. J.
name: Horn, T.
name: Huber, G. M.
name: Hungerford, E.
name: Jiang, X.
name: Jones, M. K.
name: Joo, K.
name: Kalantarians, N.
name: Kelly, J. J.
name: Keppel, C. E.
name: Kubarovsky, V.
name: Li, Y.
name: Liang, Y.
name: Malace, S.
name: Markowitz, P.
name: McKee, P.
name: Meekins, D. G.
name: Mkrtchyan, H.
name: Moziak, B.
name: Navasardyan, T.
name: Niculescu, G.
name: Niculescu, I.
name: Opper, A. K.
name: Ostapenko, T.
name: Reimer, P. E.
name: Reinhold, J.
name: Roche, J.
name: Rock, S. E.
name: Schulte, E.
name: Segbefia, E.
name: Smith, C.
name: Smith, G. R.
name: Stoler, P.
name: Tadevosyan, V.
name: Tang, L.
name: Tvaskis, V.
name: Ungaro, M.
name: Uzzle, A.
name: Vidakovic, S.
name: Villano, A.
name: Vulcan, W. F.
name: Wang, M.
name: Warren, G.
name: Wesselmann, F. R.
name: Wojtsekhowski, B.
name: Wood, S. A.
name: Xu, C.
name: Yuan, L.
name: Zheng, X.
name: Zhu, H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The differential cross-section for the process p(e,e'p)eta has been measured at Q2 ~ 5.7 and 7.0 (GeV/c)2 for centre-of-mass energies from threshold to 1.8 GeV, encompassing the S11(1535) resonance, which dominates the channel. This is the highest momentum transfer measurement of this exclusive process to date. The helicity-conserving transition amplitude A_1/2, for the production of the S11(1535) resonance, is extracted from the data. Within the limited Q2 now measured, this quantity appears to begin scaling as 1/Q3 - a predicted, but not definitive, signal of the dominance of perturbative QCD, at Q2 ~ 5 (GeV/c)2.
description: LaTeX, 30 pages, 29 figures, uses longtable.sty, slashbox.sty, ifthen.sty; (v2) corrected figure inclusions; (v3) changes in filenames for prc and added Report-no; (v4) correction based on comments from referee {small changes to abstract and conclusion, inserted figure 9, other small changes to the text} (v5) very minor additions to improve clarity
Observational Limits on Inverse Compton Processes in GRBs
Creators: name: Piran, Tsvi
name: Sari, Re'em
name: Zou, Yuan-Chuan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Inverse Compton (IC) scattering is one of two viable mechanisms that can produce the prompt gamma-ray emission in Gamma-Ray Bursts. IC requires low energy seed photons and a population of relativistic electrons that upscatter them. The same electrons can upscatter the gamma-ray photons to even higher energies in the TeV range. Using the current upper limits on the prompt optical emission we show here that under general conservative assumption the IC mechanism suffers from an "energy crisis". Namely, IC will over-produce a very high energy component that would carry much more energy than the observed prompt gamma-rays. Our analysis is general and it makes no assumptions on the specific mechanism that produces the relativistic electrons population.
description: 15 pages, 7 figures, MNRAS accepted
LkH$α$ 225 (V1318 Cyg) South in Outburst
Creators: name: Hillenbrand, Lynne A.
name: Isaacson, Howard
name: Rodriguez, Antonio C.
name: Connelley, Michael
name: Reipurth, Bo
name: Kuhn, Michael A.
name: Beck, Tracy
name: Perez, Diego Rodriguez
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Magakian et al. (2019) called attention to the current bright state of LkHa 225 South, which over the past two decades has changed from $>20^m$ to $<13^m$. We present recent optical photometric monitoring that shows colorless, non-sinusoidal, periodic brightness variations. The oscillations occur every 43 days, and have amplitude $\sim$0.7 mag with some variation among cycles. We also present new flux-calibrated optical and near-infrared spectroscopy, which we model in terms of a keplerian disk. Additional high dispersion spectra demonstrate the similarity of the absorption line pattern to some categories of "mixed temperature" accretion outburst objects. At blue wavelengths, LkHa 225 South has a pure absorption spectrum and is a good spectral match to the FU Ori stars V1515 Cyg and V1057 Cyg. At red optical and infrared wavelengths, however, the spectrum is more similar to Gaia 19ajj, showing emission in TiO, CO, and metals. Sr II lines indicate a low surface gravity atmosphere. There are also signatures of a strong wind/outflow. LkHa 225 South was moderately bright in early 1950's as well as in late 1980's, with evidence for deep fades during intervening epochs. The body of evidence suggests that LkHa225 South is another case of a source with episodically enhanced accretion that causes brightening by orders of magnitude, and development of a hot absorption spectrum and warm wind. It is similar to Gaia 19ajj, but also reminiscent in its long brightening time and brightness oscillation near peak, to the embedded sources L1634 IRS7 and ESO Ha 99.
description: replacement contains the version accepted to AJ
Scaling relation for earthquake networks
Creators: name: Abe, Sumiyoshi
name: Suzuki, Norikazu
Publisher: name: arXiv
Year: 2008
Subjects: subject: Geophysics (physics.geo-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The scaling relation derived by Dorogovtsev, Goltsev, Mendes and Samukhin [Phys. Rev. E, 68 (2003) 046109] states that the exponents of the power-law connectivity distribution, gamma, and the power-law eigenvalue distribution of the adjacency matrix, delta, of a locally treelike scale-free network satisfy 2*gamma - delta = 1 in the mean field approximation. Here, it is shown that this relation holds well for the reduced simple earthquake networks (without tadpole-loops and multiple edges) constructed from the seismic data taken from California and Japan. The result is interpreted from the viewpoint of the hierarchical organization of the earthquake networks.
description: 14 pages, 3 figures, 1 table
Semiflexible polymer enclosed in a 3D compact domain
Creators: name: Castro-Villarreal, Pavel
name: Ramírez, J. E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The conformational states of a semiflexible polymer enclosed in a volume $V:=\ell^{3}$ are studied as stochastic realizations of paths using the stochastic curvature approach developed in [Rev. E 100, 012503 (2019)], in the regime whenever $3\ell/\ell_ {p}> 1$, where $\ell_{p}$ is the persistence length. The cases of a semiflexible polymer enclosed in a cube and sphere are considered. In these cases, we explore the Spakowitz-Wang type polymer shape transition, where the critical persistence length distinguishes between an oscillating and a monotonic phase at the level of the mean-square end-to-end distance. This shape transition provides evidence of a universal signature of the behavior of a semiflexible polymer confined in a compact domain.
description: 13 pages, 2 figures, Accepted on 19 May 2021 in Front. Phys
High frequency beam diffraction by apertures and reflectors
Creators: name: Suedan, Gibreel A.
Publisher: name: University of British Columbia
Year: 2010

description: Most solutions for electromagnetic wave diffraction by obstacles and apertures assume plane wave incidence or omnidirectional local sources. Solutions to diffraction problems for local directive sources are needed. The complex source point representation of directive beams together with uniform solutions to high frequency diffraction problems is a powerful combination for this. Here the method is applied to beam diffraction by planar structures with edges, such as the half-plane, slit, strip, wedge and circular aperture. Previously used restrictions to very narrow beams and paraxial regions, are removed here and the range of validity increased. Also it is shown that the complex source point method can give a better approximation to broad antenna beams than the Gaussian function. The solution derived for the half-plane problem is uniform, accurate and valid for all beam orientations. This solution can be used as a reference solution for other uniform or asymptotic solutions and is used to solve for the wide slit and complementary strip problems. Uniform solutions for omidirectional sources are developed and extended analytically to become solutions for directive beams. The uniform theory of diffraction is used to obtain uniform solutions where there are no simple exact solutions, such as for the wedge and circular aperture. Otherwise rigorously correct solutions at high frequencies for singly diffracted far fields are used, such as for the half-plane, slit and strip. The geometrical theory of diffraction and equivalent line currents are used to include interaction between edges. Extensive numerical results including the limiting cases; e.g. plane wave incidence, line and point sources are given. These solutions are compared with previous solutions, wherever possible and good agreement is evident Beam diffraction by a wedge with its edge on the beam axis is analysed. This solution completes a previous asymptotic solution which is infinite on the shadow boundaries and inaccurate in the transition regions. Finally, the diffraction by a circular aperture illuminated by normally incident acoustic beam, is derived and the singularity along the axial caustic is removed using Bessel functions and a closed form expression for multiple diffraction is derived.
MOESM3 of A benchmark of batch-effect correction methods for single-cell RNA sequencing data
Creators: name: Tran, Hoa
name: Ang, Kok
name: Chevrier, Marion
name: Zhang, Xiaomeng
name: Lee, Nicole
name: Goh, Michelle
name: Chen, Jinmiao
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: Evolutionary Biology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Cancer
subject: Computational Biology

description: Additional file 3: Table S3. Scenarios and datasets. The table lists the datasets and which scenario each fall under. Each dataset may qualify for more than one scenario.
Charged particles in crossed and longitudinal electromagnetic fields and beam guides
Creators: name: Bagrov, V. G.
name: Baldiotti, M. C.
name: Gitman, D. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We consider a class of electromagnetic fields that contains crossed fields combined with longitudinal electric and magnetic fields. We study the motion of a classical particle (solutions of the Lorentz equations) in such fields. Then, we present an analysis that allows one to decide which fields from the class act as a beam guide for charged particles, and we find some time-independent and time-dependent configurations with beam guiding properties. We demonstrate that the Klein-Gordon and Dirac equations with all the fields from the class can be solved exactly. We study these solutions, which were not known before, and prove that they form complete and orthogonal sets of functions.
description: 14 pages
Additional file 1 of Enhancing stroke rehabilitation with whole-hand haptic rendering: development and clinical usability evaluation of a novel upper-limb rehabilitation device
Creators: name: Rätz, Raphael
name: Conti, François
name: Thaler, Irène
name: Müri, René M.
name: Marchal-Crespo, Laura
Publisher: name: figshare
Year: 2024
Subjects: Space Science
Medicine
Neuroscience
Biotechnology
Biological Sciences not elsewhere classified
Information Systems not elsewhere classified
Science Policy
Mental Health

description: Supplementary file 1.
New parameters of Non-commutativity in Quantum Mechanics
Creators: name: Ijavi, Mostafa
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: At this paper, it is considered to find a way for defining non-commutative spaces by ordinary commutative ones and vice versa. A novel parameter which has not been considered so far is represented. This parameter describes equivalent spaces. Also, we searched concepts of these new parameters with one problem. Noncommutativity in total space is important here because it could explain more concepts. As we knew SW method (Seiberg-Witten) explained noncommutativity so here, we showed that it was not suitable for some conditions.in the end we considered Hamiltonian of free particle in new noncommutativity and we found concepts of new parameters.
Enhanced U-Pb detrital zircon, Lu-Hf zircon, δ18O zircon, and Sm-Nd whole rock global databases
Creators: name: Puetz, Stephen
name: Spencer, Christopher
name: Condie, Kent
name: Roberts, Nick
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 370303
subject: Isotope geochemistry

description: High-quality global isotopic databases provide Earth scientists with robust means for developing and testing a variety of geological hypotheses. Database design establishes the range of questions that can be addressed, and validation techniques can enhance data quality. Here, six validated global isotopic databases provide extensive records of analyses from U-Pb in detrital zircon, Lu-Hf in zircon, Sm-Nd from whole rocks, and δ18O in zircon. The U-Pb detrital zircon records are segregated into three independently sampled databases. Independent samples are critical for testing the replicability of results, a key requisite for gaining confidence in the validity of a hypothesis. An advantage of our updated databases is that a hypothesis developed from one of the global detrital zircon databases can be immediately tested with the other two independent detrital zircon databases to assess the replicability of results. The independent εHf(t) and εNd(t) values provide similar means of testing for replicable results. This contribution discusses database design, data limitations, and validation techniques used to ensure the data are optimal for subsequent geological investigations.
Reflecting magnons
Creators: name: Hofman, Diego M.
name: Maldacena, Juan
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the worldsheet reflection matrix of a string attached to a D-brane in $AdS_5 \times S^5$. The D-brane corresponds to a maximal giant graviton and it wraps an $S^3$ inside $S^5$. In the gauge theory, the open string is described by a spin chain with boundaries. We study an open string with a large SO(6) charge, which allows us to focus on one boundary at a time and to define an asymptotic boundary reflection matrix. We consider two cases corresponding to two possible relative orientations for the charges of the giant graviton and the open string. Using the symmetries of the problem we compute the boundary reflection matrix up to a phase. These matrices obey the boundary Yang Baxter equation. A crossing equation is derived for the overall phase. We perform weak coupling computations up to two loops and obtain results that are consistent with integrability. Finally, we determine the phase factor at strong coupling using classical solutions.
description: 49 pages, 11 figures
A quantum state for the late Universe
Creators: name: Giusti, Andrea
name: Buffa, Silvia
name: Heisenberg, Lavinia
name: Casadio, Roberto
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the quantum description of a toy model universe in which the Schwarzschild-de Sitter geometry emerges from the coherent state of a massless scalar field. Although highly idealised, this simple model allows us to find clear hints supporting the conclusion that the reaction of the de Sitter background to the presence of matter sources induces i) a modified Newtonian dynamics at galactic scales and ii) different values measured for the present Hubble parameter. Both effects stem from the conditions required to have a normalisable quantum state.
description: LaTeX, 12 pages, no figures
Additional file 2 of Enhancing stroke rehabilitation with whole-hand haptic rendering: development and clinical usability evaluation of a novel upper-limb rehabilitation device
Creators: name: Rätz, Raphael
name: Conti, François
name: Thaler, Irène
name: Müri, René M.
name: Marchal-Crespo, Laura
Publisher: name: figshare
Year: 2024
Subjects: Space Science
Medicine
Neuroscience
Biotechnology
Biological Sciences not elsewhere classified
Information Systems not elsewhere classified
Science Policy
Mental Health

description: Supplementary file 2.
A New Distance to The Antennae Galaxies (NGC 4038/39) Based on the Type Ia Supernova 2007sr
Creators: name: Schweizer, Francois
name: Burns, Christopher R.
name: Madore, Barry F.
name: Mager, Violet A.
name: Phillips, M. M.
name: Freedman, Wendy L.
name: Boldt, Luis
name: Contreras, Carlos
name: Folatelli, Gaston
name: Gonzalez, Sergio
name: Hamuy, Mario
name: Krzeminski, Wojtek
name: Morrell, Nidia I.
name: Persson, S. E.
name: Roth, Miguel R.
name: Stritzinger, Maximilian D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Traditionally, the distance to NGC 4038/39 has been derived from the systemic recession velocity, yielding about 20 Mpc for H_0 = 72 km/s/Mpc. Recently, this widely adopted distance has been challenged based on photometry of the presumed tip of the red giant branch (TRGB), which seems to yield a shorter distance of 13.3+-1.0 Mpc and, with it, nearly 1 mag lower luminosities and smaller radii for objects in this prototypical merger. Here we present a new distance estimate based on observations of the Type Ia supernova (SN) 2007sr in the southern tail, made at Las Campanas Observatory as part of the Carnegie Supernova Project. The resulting distance of D(SN Ia) = 22.3+-2.8 Mpc [(m-M)_0 = 31.74+-0.27 mag] is in good agreement with a refined distance estimate based on the recession velocity and the large-scale flow model developed by Tonry and collaborators, D(flow) = 22.5+-2.8 Mpc. We point out three serious problems that a short distance of 13.3 Mpc would entail, and trace the claimed short distance to a likely misidentification of the TRGB. Reanalyzing Hubble Space Telescope (HST) data in the Archive with an improved method, we find a TRGB fainter by 0.9 mag and derive from it a preliminary new TRGB distance of D(TRGB) = 20.0+-1.6 Mpc. Finally, assessing our three distance estimates we recommend using a conservative, rounded value of D = 22+-3 Mpc as the best currently available distance to The Antennae.
description: 8 pages, 5 figures, 1 table (emulateapj; uses amsmath package). Accepted for publication in The Astronomical Journal, Vol. 136. Figs. 1 & 2 degraded to reduce file sizes
Modeling Heterogeneous Materials via Two-Point Correlation Functions: I. Basic Principles
Creators: name: Jiao, Y.
name: Stillinger, F. H.
name: Torquato, S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Heterogeneous materials abound in nature and man-made situations. Examples include porous media, biological materials, and composite materials. Diverse and interesting properties exhibited by these materials result from their complex microstructures, which also make it difficult to model the materials. In this first part of a series of two papers, we collect the known necessary conditions on the standard two-point correlation function S2(r) and formulate a new conjecture. In particular, we argue that given a complete two-point correlation function space, S2(r) of any statistically homogeneous material can be expressed through a map on a selected set of bases of the function space. We provide new examples of realizable two-point correlation functions and suggest a set of analytical basis functions. Moreover, we devise an efficient and isotropy- preserving construction algorithm, namely, the Lattice-Point algorithm to generate realizations of materials from their two- point correlation functions based on the Yeong-Torquato technique. Subsequent analysis can be performed on the generated images to obtain desired macroscopic properties. These developments are integrated here into a general scheme that enables one to model and categorize heterogeneous materials via two-point correlation functions.
description: 37 pages, 26 figures
A First Look on 3D Effects in Open Axion Haloscopes
Creators: name: Knirck, Stefan
name: Schuette-Engel, Jan
name: Millar, Alexander J.
name: Redondo, Javier
name: Reimann, Olaf
name: Ringwald, Andreas
name: Steffen, Frank D.
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2019

description: We explore finite size 3D effects in open axion haloscopes such as a dish antenna, a dielectric disk and a minimal dielectric haloscope consisting of a mirror and one dielectric disk. Particularly dielectric haloscopes are a promising new method for detecting dark matter axions in the mass range above $40\,\mu{\rm eV}$. By using two specialized independent approaches - based on finite element methods and Fourier optics - we compute the electromagnetic fields in these settings expected in the presence of an axion dark matter field. This allows us to study diffraction and near field effects for realistically sized experimental setups in contrast to earlier idealized 1D studies with infinitely extended mirrors and disks. We also study axion velocity effects and disk tiling. Diffraction effects are found to become less relevant towards larger axion masses and for the larger disk radii for example aimed at in full size dielectric haloscopes such as MADMAX. The insights of our study not only provide a foundation for a realistic modelling of open axion dark matter search experiments in general, they are in particular also the first results taking into account 3D effects for dielectric haloscopes.
Hardy type inequality in variable Lebesgue spaces
Creators: name: Rafeiro, Humberto
name: Samko, Stefan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 47B38; 42B35; 46E35

description: We prove that in variable exponent spaces $L^{p(\cdot)}(Ω)$, where $p(\cdot)$ satisfies the log-condition and $Ω$ is a bounded domain in $\mathbf R^n$ with the property that $\mathbf R^n \backslash \barΩ$ has the cone property, the validity of the Hardy type inequality $$| 1/δ(x)^α\int_Ωϕ(y) dy/|x-y|^{n-α}|_{p(\cdot)} \leqq C |ϕ|_{p(\cdot)}, \quad 0
description: 16 pages
Properties of MoO2 and MoO3 Films Prepared from the Chemically Driven Isothermal Close Space Vapor Transport Technique
Creators: name: de Melo, O.
name: Gonzalez, Y.
name: Climent-Font, A.
name: Galan, P.
name: Ruediger, A.
name: Sanchez, M.
name: Calvo, C.
name: Santana, G.
name: Torres-Costa, V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Chemically _ driven isothermal close space vapour transport was used to prepare pure MoO2 films which were eventually converted to MoO3 by annealing in air. According to temperature_dependent Raman measurements, the MoO2/MoO3 phase transformation was found to occur in the 225 _ 350 oC range; no other phases were detected during the transition. A clear change in composition and Raman spectra, as well as noticeable modifications of the band gap and the absorption coefficient confirmed the conversion from MoO2 to MoO3. An extensive characterization of films of both pure phases was carried out. In particular, a procedure was developed to determine the dispersion relation of the refractive index of MoO2 from the shift of the interference fringes the used SiO2/Si substrate. The obtained refractive index was corrected taking into account the porosity calculated from elastic backscattering spectrometry. The Debye temperature and the residual resistivity were extracted from the electrical resistivity temperature dependence using the Bloch _ Gruneisen equation. MoO3 converted samples presented very high resistivity and a typical semiconducting behaviour. They also showed intense and broad luminescence spectra, which were deconvoluted considering several contributions; and its behaviour with temperature was examined. Furthermore, surface photovoltage spectra were taken and the relation of these spectra with the photoluminescence is discussed.
Robotic manipulator modelling and control
Creators: name: Shi, Pingnan
Publisher: name: University of British Columbia
Year: 2010

description: In this thesis, a special control strategy is proposed which treats manipulators as a unique class of systems with their own unique characteristics. The objectives of proposing the control strategy are to obtain 1) no or tolerable overshoot; 2) smaller settling time; and 3) higher accuracy. Two two-link manipulators and one three-link manipulator were simulated and controlled by the proposed control strategy. The results are provided in the thesis. The proposed control strategy has the structure of local and global control. The local control takes care of the links. Its objective is to drive the links to the desired positions, disregarding the effects caused by gravity torques and the coupling and the interaction between links. The objective of the global control is to compensate for the effects ignored by the local control. The local control law has the feature of variable structure control. The decision concerning the control to be switched to depends on the region in the phase-plane the trajectory of the subsystem (link) is in. The switching time is determined by the state of the subsystem in the phase-plane via a simple criterion. A simplified model is also proposed and used to construct the control strategy. The model is built up with emphasis on the effective moment of inertia and gravity torques.
Foreground Contamination in Interferometric Measurements of the Redshifted 21 cm Power Spectrum
Creators: name: Bowman, Judd D.
name: Morales, Miguel F.
name: Hewitt, Jacqueline N.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Subtraction of astrophysical foreground contamination from "dirty" sky maps produced by simulated measurements of the Murchison Widefield Array (MWA) has been performed by fitting a 3rd-order polynomial along the spectral dimension of each pixel in the data cubes. The simulations are the first to include the unavoidable instrumental effects of the frequency-dependent primary antenna beams and synthesized array beams. They recover the one-dimensional spherically-binned input redshifted 21 cm power spectrum to within approximately 1% over the scales probed most sensitively by the MWA (0.01 < k < 1 Mpc^-1) and demonstrate that realistic instrumental effects will not mask the EoR signal. We find that the weighting function used to produce the dirty sky maps from the gridded visibility measurements is important to the success of the technique. Uniform weighting of the visibility measurements produces the best results, whereas natural weighting significantly worsens the foreground subtraction by coupling structure in the density of the visibility measurements to spectral structure in the dirty sky map data cube. The extremely dense uv-coverage of the MWA was found to be advantageous for this technique and produced very good results on scales corresponding to |u| < 500 wavelengths in the uv-plane without any selective editing of the uv-coverage.
description: Replaced with version accepted by ApJ. 19 pages, including 3 figures
Implications of Leptonic Unitarity Violation at Neutrino Telescopes
Creators: name: Xing, Zhi-zhong
name: Zhou, Shun
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A measurement of the ultrahigh-energy (UHE) cosmic neutrinos at a km^3-size neutrino telescope will open a new window to constrain the 3 x 3 neutrino mixing matrix V and probe possible new physics. We point out that it is in principle possible to examine the non-unitarity of V, which is naturally expected in a class of seesaw models with one or more TeV-scale Majorana neutrinos, by using neutrino telescopes. Considering the UHE neutrinos produced from the decays of charged pions arising from proton-proton and (or) proton-gamma collisions at a distant astrophysical source, we show that their flavor ratios at a terrestrial neutrino telescope may deviate from the democratic flavor distribution ϕ^T_e : ϕ^T_μ: ϕ^T_τ= 1 : 1 : 1 due to the seesaw-induced unitarity violation of V. Its effect can be as large as several percent and can serve for an illustration of how sensitive a neutrino telescope should be to this kind of new physics.
description: 12 pages, 2 PS figures, accepted for publication in Phys. Lett. B
The first rotation periods in Praesepe
Creators: name: Scholz, Alexander
name: Eisloeffel, Jochen
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The cluster Praesepe (age 650 Myr) is an ideal laboratory to study stellar evolution. Specifically, it allows us to trace the long-term decline of rotation and activity on the main-sequence. Here we present rotation periods measured for five stars in Praesepe with masses of 0.1-0.5Ms -- the first rotation periods for members of this cluster. Photometric periodicities were found from two extensive monitoring campaigns, and are confirmed by multiple independent test procedures. We attribute these variations to magnetic spots co-rotating with the objects, thus indicating the rotation period. The five periods, ranging from 5 to 84h, show a clear positive correlation with object mass, a trend which has been reported previously in younger clusters. When comparing with data for F-K stars in the coeval Hyades, we find a dramatic drop in the periods at spectral type K8-M2 (corresponding to 0.4-0.6Ms). A comparison with periods of VLM stars in younger clusters provides a constraint on the spin-down timescale: We find that the exponential rotational braking timescale is clearly longer than 200 Myr, most likely 400-800 Myr. These results are not affected by the small sample size in the rotation periods. Both findings, the steep drop in the period-mass relation and the long spin-down timescale, indicate a substantial change in the angular momentum loss mechanism for very low mass objects, possibly the breakdown of the solar-type (Skumanich) rotational braking. While the physical origin for this behaviour is unclear, we argue that parts of it might be explained by the disappearance of the radiative core and the resulting breakdown of an interface-type dynamo in the VLM regime. Rotational studies in this mass range hold great potential to probe magnetic properties and interior structure of main-sequence stars.
description: 10 pages, 3 figures, accepted for publication in MNRAS
Interfacial strain defines the self-organization of epitaxial MoO2 flakes and porous films on sapphire: experiments and modelling
Creators: name: de Melo, O.
name: Torres_Costa, V.
name: Gonzalez, Y.
name: Ruediger, A.
name: de Melo, C.
name: Ghanbaja, J.
name: Horwat, D.
name: Escobosa, A.
name: Concepcion, O.
name: Santana, G.
name: Ramos, E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: The epitaxy of MoO2 on c_plane sapphire substrates is examined. A theoretical approach, based on density functional theory calculations of the strain energy, allowed to predict the preferred layer/substrate epitaxial relationships. To test the results of these calculations, MoO2/(001) Al2O3 heterostructures were grown using the chemically_driven isothermal close space vapour transport technique. At the early stages of the growth, two kinds of morphologies were obtained, using the same growth parameters: lying and standing flakes. The composition and morphology, as well as the layer/substrate epitaxial relationships were determined for both kind of morphologies. Experimental epitaxial relationships coincide with those predicted by DFT calculation as the most favourable ones in terms of strain energy. For thicker films, the standing flakes evolve to form an epitaxial porous layer composed by coalesced epitaxial flakes. The interfacial strain between the sapphire substrate and MoO2 enables a self_organization from nanometer to micron scales between separated or coalesced flakes, depending on deposition condition.
Hamilton-Jacobi formalism for string gas thermodynamics
Creators: name: Joseph, Anosh
name: Rajeev, S. G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that the thermodynamics of a system of strings at high energy densities under the ideal gas approximation has a formulation in terms of Hamilton-Jacobi theory. The two parameters of the system, which have dimensions of energy density and number density, respectively, define a family of hypersurfaces of co-dimension one, which can be described by the vanishing of a function F that plays the role of a Hamiltonian.
description: v2: 8 pages, 2 figures, references added
Standard Bases in K[[t_1,...,t_m]][x_1,...,x_n]^s
Creators: name: Markwig, Thomas
Publisher: name: arXiv
Year: 2007
Subjects: subject: Commutative Algebra (math.AC)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 13P10; 13F25; 12J25; 16W60

description: In this paper we study standard bases for submodules of K[[t_1,...,t_m]][x_1,...,x_n]^s respectively of their localisation with respect to a t-local monomial ordering. The main step is to prove the existence of a division with remainder generalising and combining the division theorems of Grauert and Mora. Everything else then translates naturally. Setting either m=0 or n=0 we get standard bases for polynomial rings respectively for power series rings as a special case. We then apply this technique to show that the t-initial ideal of an ideal over the Puiseux series field can be read of from a standard basis of its generators. This is an important step in the constructive proof that each point in the tropical variety of such an ideal admits a lifting.
Crystal structure and physical properties of half-doped manganite nanocrystals with size < 100nm
Creators: name: Sarkar, Tapati
name: Ghosh, Barnali
name: Raychaudhuri, A. K.
name: Chatterji, Tapan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In this paper we report the structural and property (magnetic and electrical transport) measurements of nanocrystals of half-doped $\mathrm{La_{0.5}Ca_{0.5}MnO_3}$(LCMO) synthesized by chemical route, having particle size down to an average diameter of 15nm. It was observed that the size reduction leads to change in crystal structure and the room temperature structure is arrested so that the structure does not evolve on cooling unlike bulk samples. The structural change mainly affects the orthorhombic distortion of the lattice. By making comparison with observed crystal structure data under hydrostatic pressure it is suggested that the change in the crystal structure of the nanocrystals occurs due to an effective hydrostatic pressure created by the surface pressure on size reduction. This not only changes the structure but also causes the room temperature structure to freeze-in. The size reduction also does not allow the long supercell modulation needed for the Charge Ordering, characteristic of this half-doped manganite, to set-in. The magnetic and transport measurements also show that the Charge Ordering (CO) does not occur when the size is reduced below a critical size. Instead, the nanocrystals show ferromagnetic ordering down to the lowest temperatures along with metallic type conductivity. Our investigation establishes a structural basis for the destabilization of CO state observed in half-doped manganite nanocrystals.
description: 11 pages, 13 Figures
คุณธรรม จริยธรรม ที่จำเป็นในการอยู่ร่วมกันอย่างมีความสุขทั้ง 4 ด้าน ของนักศึกษาสาขาวิชาเทคโนโลยีอุตสาหกรรม คณะวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยราชภัฏธนบุรี
Creators: name: สถาพร จำรัสเลิศลักษณ์
Publisher: name: ศูนย์คุณธรรม (องค์การมหาชน)
Year: 2012
Subjects: การอยู่ร่วมกันอย่างมีความสุข

description: 1, 1, วารสารวิชาการคุณธรรมความดี
Outreach Posters for the Preliminary Results of the Project 'Demand and Values of Nature’s Contributions to People (NCP)' embedded within the DFG Research Unit 'The role of nature for human well-being in the Kilimanjaro Social-Ecological System (Kili-SES)'
Creators: name: Meyer, Jelke
name: Gross, Milena
name: Martín-López, Berta
name: Pearson, Jasmine
name: Sanya Julius, John
Publisher: name: Medien- und Informationszentrum, Leuphana Universität Lüneburg
Year: 2023
Subjects: classificationCode: 333
subject: 333 Boden- und Energiewirtschaft

description: These posters were created for and presented at an outreach tour at Mt Kilimanjaro, Tanzania. The purpose of this outreach tour was to disseminate research findings back to research participants and other interested actors within the Kilimanjaro region. The main author, Jelke Meyer, designed the posters and illustrations herself which also forms the basis of her Bachelor thesis. The content entails a visual summary of the Nature's Contributions to People (NCP) and values of nature at Mt Kilimanjaro as expressed by different actors including Chagga and local communities, nature conservationists, tour guides and tourists. These results are based on a series of interviews, focus group discussions and surveys conducted, transcribed and analysed by four researchers of this project (also listed as authors of this poster collection).
Completeness of the classical 2D Ising model and universal quantum computation
Creators: name: Nest, M. Van den
name: Dür, W.
name: Briegel, H. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We prove that the 2D Ising model is complete in the sense that the partition function of any classical q-state spin model (on an arbitrary graph) can be expressed as a special instance of the partition function of a 2D Ising model with complex inhomogeneous couplings and external fields. In the case where the original model is an Ising or Potts-type model, we find that the corresponding 2D square lattice requires only polynomially more spins w.r.t the original one, and we give a constructive method to map such models to the 2D Ising model. For more general models the overhead in system size may be exponential. The results are established by connecting classical spin models with measurement-based quantum computation and invoking the universality of the 2D cluster states.
description: 4 pages, 1 figure. Minor changes
Optimal estimation of losses at the ultimate quantum limit with non-Gaussian states
Creators: name: Adesso, G.
name: Dell'Anno, F.
name: De Siena, S.
name: Illuminati, F.
name: Souza, L. A. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We address the estimation of the loss parameter of a bosonic channel probed by arbitrary signals. Unlike the optimal Gaussian probes, which can attain the ultimate bound on precision asymptotically either for very small or very large losses, we prove that Fock states at any fixed photon number saturate the bound unconditionally for any value of the loss. In the relevant regime of low-energy probes, we demonstrate that superpositions of the first low-lying Fock states yield an absolute improvement over any Gaussian probe. Such few-photon states can be recast quite generally as truncations of de-Gaussified photon-subtracted states.
description: 4 pages, 3 figures
Additional file 1 of Knockdown of microglial iron import gene, Slc11a2, worsens cognitive function and alters microglial transcriptional landscape in a sex-specific manner in the APP/PS1 model of Alzheimer’s disease
Creators: name: Robertson, Katrina Volk
name: Rodriguez, Alec S.
name: Cartailler, Jean-Philippe
name: Shrestha, Shristi
name: Schleh, Michael W.
name: Schroeder, Kyle R.
name: Valenti, Arianna M.
name: Kramer, Alec T.
name: Harrison, Fiona E.
name: Hasty, Alyssa H.
Publisher: name: figshare
Year: 2024
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1. Experimental model and timeline diagram. A Schematic of mouse model generated in these studies. Slc11a2flfl;Cx3cr1Cre-ERT2+/+ mice were bred with Slc11a2flfl;APP/PS1+ hemizygotes to yield two resultant genotypes: Slc11a2flfl;Cx3cr1Cre-ERT2+/-;APP/PS1+ and Slc11a2flfl;Cx3cr1Cre-ERT2+/-;WT. Tamoxifen was administered to half the animals to induce knockdown of microglial Slc11a2, and corn oil was used as a control. This resulted in four experimental groups: Control WT, Slc11a2KD WT, Control APP/PS1+, and Slc11a2KD APP/PS1+. B Timeline of experiments. Tamoxifen gavage was used to induce Slc11a2 knockdown at 5-6 months of age, and behavioral analyses were conducted between 12-15 months of age. Tissue was collected when mice were 15-18 months of age. C CD11b+ microglial cells were isolated from whole brains, and confirmation of Slc11a2 knockdown was done via RT-qPCR using a primer targeting exons 7-8 in both sexes. Two-way ANOVA, ****p<0.0001 effect of knockdown.
Time reversal of Bose-Einstein condensates
Creators: name: Martin, J.
name: Georgeot, B.
name: Shepelyansky, D. L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chaotic Dynamics (nlin.CD)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Using Gross-Pitaevskii equation, we study the time reversibility of Bose-Einstein condensates (BEC) in kicked optical lattices, showing that inside the regime of quantum chaos the dynamics can be inverted from explosion to collapse. The accuracy of time reversal decreases with the increase of atom interactions inside BEC, until it is completely lost. Surprisingly, quantum chaos helps to restore time reversibility. These predictions can be tested with existing experimental setups.
description: 4 pages, 5 figures. References and discussion added. Research done at http://www.quantware.ups-tlse.fr/
Stellar age dependence of the nonextensive magnetic braking index: a test for the open cluster $α$Per
Creators: name: de Freitas, Daniel B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Using a generalized function of the stellar spin-down law, we investigate the age dependence of the magnetic braking index ($q$). Our survey includes 9 open clusters aged lower than 1 Gyr and ranged in mass from 0.7 to 1.1$M_{\odot}$. Our aim is to verify the time behavior of the nonextensive braking index $q$ which brings the cumulative distribution of the rotational velocities of the stars of the youngest cluster ($α{\rm Per}$) taken at the future age of an older cluster. As a result, the $q$-index is calculated over time $t-t_{α{\rm Per}}$, where $t$ is the age of older open cluster used to estimate the future cumulative distribution of the rotational velocity of the $α{\rm Per}$ cluster with present-day age $t_{α{\rm Per}}$. We find that the values of $q$ are slightly constant around 1.36 and 1.38 according to the mass bin. In conclusion, the results seem to indicate that the mechanism that controls the rotational decay of stars in open clusters does not depend on the increment of time.
description: 6 pages, 3 figures, 2 tables, submit to the EPL journal. arXiv admin note: text overlap with arXiv:2003.01444, arXiv:2003.06287
Heterotic twistor-string theory
Creators: name: Mason, Lionel
name: Skinner, David
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We reformulate twistor-string theory as a heterotic string based on a twisted (0,2) model. The path integral localizes on holomorphic maps, while the (0,2) moduli naturally correspond to the states of N=4 super Yang-Mills and conformal supergravity under the Penrose transform. We show how the standard twistor-string formulae of scattering amplitudes as integrals over the space of curves in supertwistor space may be obtained from our model. The corresponding string field theory gives rise to a twistor action for N=4 conformal supergravity coupled to super Yang-Mills. The model helps to explain how the twistor-strings of Witten and Berkovits are related and clarifies various aspects of each of these models.
description: 45 pages
MOESM4 of A benchmark of batch-effect correction methods for single-cell RNA sequencing data
Creators: name: Tran, Hoa
name: Ang, Kok
name: Chevrier, Marion
name: Zhang, Xiaomeng
name: Lee, Nicole
name: Goh, Michelle
name: Chen, Jinmiao
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Developmental Biology

description: Additional file 4: Figure S1-S11. with legends.