cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Clock model and parafermions in Rashba nanowires
Creators: name: Ronetti, Flavio
name: Loss, Daniel
name: Klinovaja, Jelena
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We consider a semiconducting nanowire with Rashba spin-orbit interaction subjected to a magnetic field and in the presence of strong electron-electron interactions. When the ratio between Fermi and Rashba momenta is tuned to $1/2$, two competing resonant multi-particle scattering processes are present simultaneously and the interplay between them brings the system into a gapless critical parafermion phase. This critical phase is described by a self-dual sine-Gordon model, which we are able to map explicitly onto the low-energy sector of the $\mathbb{Z}_4$ parafermion clock chain model. Finally, we show that by alternating regions in which only one of these two processes is present one can generate localized zero-energy parafermion bound states.
description: 6 + 11 pages, 3 figures
Learning with Graph Kernels in the Chemical Universe
Creators: name: Tang, Yu-Hang
Publisher: name: Zenodo
Year: 2019
Subjects: machine learning
graph
active learning
molecular prediction
computational chemistry
kernel
similarity

description: Presentations slides of Yu-Hang Tang during the 2019 DSI Data Science Workshop on application of active machine learning and graph kernels. The talk also features the release of the GraphDot library.
description: {"references": ["Tang, Y. H., & de Jong, W. A. (2019). Prediction of atomization energy using graph kernel and active learning. The Journal of chemical physics, 150(4), 044107. https://doi.org/10.1063/1.5078640"]}
Additional file 2 of Altered expressions of CXCR4 and CD26 on T-helper lymphocytes in hereditary hemorrhagic telangiectasia
Creators: name: Guilhem, Alexandre
name: Portalès, Pierre
name: Dupuis-Girod, Sophie
name: Rivière, Sophie
name: Vincent, Thierry
Publisher: name: figshare
Year: 2021
Subjects: subject: Immunology
subject: FOS: Clinical medicine

description: Additional file 2. Gating strategy. (a) Total lymphocytes were selected in whole blood after erythrocyte lysis and staining, based on their morphological properties. Subpopulations of T lymphocytes and NK lymphocytes were determined based on the surface markers as follows: CD3+ for T cells, CD3+CD4+ for T-helper (CD45RA+ for naive, CD45RA- for memory and HLA-DR+ for activated), CD3+CD8+ for T-cytotoxic (CD45RA+ for naive, CD45RA- for memory and HLA-DR+ for activated), CD56+CD3- for NK. (b) CXCR4 and CD26 expression was assessed on T subpopulations by calculating the ratio of their mean fluorescence intensity (MFI) to the MFI of their isotype counterparts
Algebro-Geometric Finite-Gap Solutions of the Ablowitz-Ladik Hierarchy
Creators: name: Gesztesy, Fritz
name: Holden, Helge
name: Michor, Johanna
name: Teschl, Gerald
Publisher: name: arXiv
Year: 2006
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We provide a detailed derivation of all complex-valued algebro-geometric finite-band solutions of the Ablowitz-Ladik hierarchy. In addition, we survey a recursive construction of the Ablowitz-Ladik hierarchy and its zero-curvature and Lax formalism.
description: 41 pages
Searching for a Supersolid in Cold Atom Optical Lattices
Creators: name: Scarola, V. W.
name: Demler, E.
name: Sarma, S. Das
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We suggest a technique for the observation of a predicted supersolid phase in extended Bose-Hubbard models which are potentially realizable in cold atom optical lattice systems. In particular, we discuss important subtleties arising from the existence of the trapping potential which leads to an externally imposed (as opposed to spontaneous) breaking of translational invariance. We show, by carefully including the trapping potential in our theoretical formalism, that noise correlations could prove instrumental in identifying the supersolid and density wave phases. We also find that the noise correlation peak width scales inversely with the relative size of trapped Mott domains.
description: 5 pages, 4 figures
Additional file 1 of Third birth intention of the childbearing-age population in mainland China and sociodemographic differences: a cross-sectional survey
Creators: name: Yan, Zhang
name: Hui, Lin
name: Wenbin, Jiang
name: Liuxue, Lu
name: Yuemei, Li
name: Bohan, Lv
name: Lili, Wei
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Cell Biology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Developmental Biology
subject: Cancer
subject: Science Policy

description: Additional file 1.
Observation of the $pη'$ Cusp in the New Precise Beam Asymmetry $Σ$ Data for $γp\to p η$
Creators: name: TAPS Collaboration
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Data on the beam asymmetry $Σ$ in the photoproduction of $η$ mesons off protons are reported for tagged photon energies from 1130 to 1790 MeV (mass range from $W=$ 1748 MeV to $W=$ 2045 MeV). The data cover the full solid angle that allows for a precise moment analysis. For the first time, a strong cusp effect in a polarization observable has been observed that is an effect of a branch-point singularity at the $pη'$ threshold [$E_γ=$ 1447 MeV ($W=$ 1896 MeV)]. The latest BnGa partial wave analysis includes the new beam asymmetry data and yields a strong indication for the $N(1895)\frac{1}{2}^-$ nucleon resonance, demonstrating the importance of including all singularities for a correct determination of partial waves and resonance parameters.
Music for a saxophone concerto
Creators: name: Leggatt, Jacqueline
Publisher: name: University of British Columbia
Year: 2009

description: Music for a Saxophone Concerto is a nineteen minute work for solo Bb soprano saxophone, string orchestra and percussion. It contains three movements with an Interlude between the first and second movements and is performed without breaks between movements. The discussion of Music for a Saxophone Concerto begins with a detailed analysis of the piece. Each movement is examined for its large and small-scale form, its pitch structure, and its links with other movements or sections in the piece. Next, the title is discussed since it is not traditional and serves to distance the listener from traditional concerti and make them question their assumptions when they sit down to listen to a saxophone concerto. For this reason, it is important to discuss briefly the Baroque, Romantic, and twentieth-century concerto to determine in which ways my piece would frustrate or compliment a modem listener's expectations. The concept of partnership is most obvious in the Baroque concerto and in neo-classical works of the twentieth century (like Stravinsky's Violin Concerto). The idea of opposing forces is more common in the Romantic period and twentieth century as exemplified by Beethoven's Piano Concerto #5 and Schoenberg's Violin Concerto. While Music for a Saxophone Concerto utilizes a Baroque dance in the first movement, it is neither a real partnership nor a relationship between conflicting characters, but rather seeks to use the concept of the soloist as 'individual' and the orchestra as 'society' in a way that demonstrates their complete integration. For this reason, contrasting textures, instrumentation, orchestration, and forms have been chosen which all, in different ways, experiment with idea of the soloist and orchestra as mutually inclusive. The use of saxophone with strings is a continuation of a rich saxophone concerto tradition but the choice of soprano saxophone is less traditional and thus, with the title and many of the formal details, leads the listener to an appreciation of the possibilities inherent in an anti-concerto.
Additional file 1 of Biphasic pattern in the effect of severe measles infection; the difference between additive and multiplicative scale
Creators: name: Le, Nhat Thanh Hoang
name: Ho, Nhan Thi
name: Grenfell, Bryan
name: Baker, Stephen
name: Geskus, Ronald B.
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Cancer
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: Additional file 1. Statistical Model: Supplementary Tables and Figures.
Interacting system NGC 7805/6 (Arp 112) and its tidal dwarf galaxy candidate
Creators: name: Fu, ZhenXing
name: Sengupta, Chandreyee
name: Sethuram, Ramya
name: Pradhan, Bikram
name: Singh, Mridweeka
name: Misra, Kuntal
name: Scott, Tom C.
name: Ma, Yin-Zhe
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present results from our Giant Metrewave Radio Telescope (GMRT) HI, Himalayan Chandra Telescope (HCT) Halpha, 1m Sampurnanand Telescope (ST) and 1.3m Devasthal Fast Optical Telescope (DFOT) deep optical observations of NGC 7805/6 (Arp 112) system to test KUG 2359+311's tidal dwarf galaxy (TDG) candidacy and explore the properties of the interacting system. Our GMRT HI map shows no HI detection associated with KUG 2359+311, nor any HI tail or bridge-like structure connecting KUG 2359+311 to the NGC 7805/6 system. Our HCT Halpha image on the other hand, shows strong detections in KUG 2359+311, with net SFR ~ 0.035$\pm 0.009 {\rm M}_{\odot}\,{\rm yr}^{-1}$. The Halpha data constrains the redshift of KUG 2359+311 to $0.00 \le z \le 0.043$, compared to the redshift of NGC 7806 of ~ 0.015. TDGs detected to date have all been HI rich, and displayed HI, ionised gas and stellar tidal debris trails (bridges or tails) linking them to their parent systems. But neither our HI data nor our optical images, while three magnitudes deeper than SDSS, reveal tidal trail connecting KUG 2359+311 to NGC 7805/6. Lack of HI , presence of an old stellar population, ongoing star formation, reasonably high SFR compared to normal dwarf galaxies suggest that KUG 2359+311 may not be an Arp 112 TDG. It is most likely a case of a regular gas-rich dwarf galaxy undergoing a morphological transformation after having lost its entire gas content to an interaction with the Arp 112 system. Redshift and metallicity from future spectroscopic observations of KUG 2359+311 would help clarify the nature of this enigmatic structure.
description: Accepted in RAA
From a toy model to the double square root voting system
Creators: name: Slomczynski, Wojciech
name: Zyczkowski, Karol
Publisher: name: arXiv
Year: 2007
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: We investigate systems of indirect voting based on the law of Penrose, in which each representative in the voting body receives the number of votes (voting weight) proportional to the square root of the population he or she represents. For a generic population distribution the quota required for the qualified majority can be set in such a way that the voting power of any state is proportional to its weight. For a specific distribution of population the optimal quota has to be computed numerically. We analyse a toy voting model for which the optimal quota can be estimated analytically as a function of the number of members of the voting body. This result, combined with the normal approximation technique, allows us to design a simple, efficient, and flexible voting system which can be easily adopted for varying weights and number of players.
description: 22 pages in latex, one figure in eps; final version to be published in Homo Oeconomicus
Additional file 1 of Landscape of HER2-low metastatic breast cancer (MBC): results from the Austrian AGMT_MBC-Registry
Creators: name: Gampenrieder, Simon Peter
name: Rinnerthaler, Gabriel
name: Tinchon, Christoph
name: Petzer, Andreas
name: Balic, Marija
name: Heibl, Sonja
name: Schmitt, Clemens
name: Zabernigg, August Felix
name: Egle, Daniel
name: Sandholzer, Margit
name: Singer, Christian Fridolin
name: Roitner, Florian
name: Hager, Christopher
name: Andel, Johannes
name: Hubalek, Michael
name: Knauer, Michael
name: Greil, Richard
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer

description: Additional file 1: Figure S1. OS of patients with HER2-low tumors, patients with completely HER2-negative tumors (HER2-0) and patients with HER2-positive tumors (HER2-pos) in the overall population (n = 1,729). Figure S2. OS of patients with HER2-low tumors and patients with completely HER2-negative tumors (HER2-0) in the overall population (n = 1,378). Figure S3. PFS of patients with HER2-low tumors and patients with completely HER2-negative tumors (HER2-0) in the HR+ population (n = 961). Figure S4. PFS of patients with HER2-low tumors and patients with completely HER2-negative tumors (HER2-0) in the HR-negative population (n = 272). Figure S5. OS of patients with HER2 2+ tumors and patients with HER2 0 or 1+ tumors in the overall population (n = 1,378). Figure S6. OS of patients with HER2 2+ tumors and patients with HER2 0 or 1+ tumors in the HR+ population (n = 1,058). Figure S7. OS of patients with HER2 2+ tumors and patients with HER2 0 or 1+ tumors in the HR-negative population (n = 320). Table S1. Multivariate analysis (Cox proportional hazard model) of PFS for HR+ MBC. Table S2. Multivariate analysis (Cox proportional hazard model) of PFS for HR-negative MBC. Table S3. Multivariate analysis (Cox proportional hazard model) of OS for premenopausal patients with HR+ MBC. Table S4. Multivariate analysis (Cox proportional hazard model) of OS for postmenopausal patients with HR+ MBC. Table S5. HR+ model stability investigations according Heinze G. et al. [17]. Table S6. HR+ model selection frequencies according Heinze G. et al. [17]. Table S7. HR- Model stability investigations according Heinze G. et al. [17]. Table S8. HR- Model selection frequencies according Heinze G. et al. [17].
A Matrix Convexity Approach to Some Celebrated Quantum Inequalities
Creators: name: Effros, Edward G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 46L89;46N50;81Q99

description: Some of the important inequalities associated with quantum entropy are immediate algebraic consequences of the Hansen-Pedersen-Jensen inequality. A general argument is given using matrix perspectives of operator convex functions. A matrix analogue of Maréchal's extended perspectives provides additional inequalities, including a $p+q\leq 1$ result of Lieb.
description: 8 pages
Acoustic wave propagation through solar granulation: Validity of effective-medium theories, coda waves
Creators: name: Poulier, P. -L.
name: Fournier, D.
name: Gizon, L.
name: Duvall, T. L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Context. The frequencies, lifetimes, and eigenfunctions of solar acoustic waves are affected by turbulent convection, which is random in space and in time. Since the correlation time of solar granulation and the periods of acoustic waves ($\sim$5 min) are similar, the medium in which the waves propagate cannot a priori be assumed to be time independent. Aims. We compare various effective-medium solutions with numerical solutions in order to identify the approximations that can be used in helioseismology. For the sake of simplicity, the medium is one dimensional. Methods. We consider the Keller approximation, the second-order Born approximation, and spatial homogenization to obtain theoretical values for the effective wave speed and attenuation (averaged over the realizations of the medium). Numerically, we computed the first and second statistical moments of the wave field over many thousands of realizations of the medium (finite-amplitude sound-speed perturbations are limited to a 30 Mm band and have a zero mean). Results. The effective wave speed is reduced for both the theories and the simulations. The attenuation of the coherent wave field and the wave speed are best described by the Keller theory. The numerical simulations reveal the presence of coda waves, trailing the coherent wave packet. These late arrival waves are due to multiple scattering and are easily seen in the second moment of the wave field. Conclusions. We find that the effective wave speed can be calculated, numerically and theoretically, using a single snapshot of the random medium (frozen medium); however, the attenuation is underestimated in the frozen medium compared to the time-dependent medium. Multiple scattering cannot be ignored when modeling acoustic wave propagation through solar granulation.
description: 13 pages, 16 figures, to be published in A&A
Steady-state nucleosynthesis throughout the Galaxy
Creators: name: Diehl, Roland
name: Krause, Martin G. H.
name: Kretschmer, Karsten
name: Lang, Michael
name: Pleintinger, Moritz M. M.
name: Siegert, Thomas
name: Wang, Wei
name: Bouchet, Laurent
name: Martin, Pierrick
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Measurement and astrophysical interpretation of characteristic gamma-ray lines from nucleosynthesis was one of the prominent science goals of the INTEGRAL mission and in particular its spectrometer SPI. Emission from 26Al and from 60Fe decay lines originates from accumulated ejecta of nucleosynthesis sources, and appears diffuse in nature. 26Al and 60Fe are believed to originate mostly from massive star clusters. Gamma-ray observations open an interesting window to trace the fate and flow of nucleosynthesis ejecta, after they have left the immediate sources and their birth sites, and on their path to mix with ambient interstellar gas. The INTEGRAL 26Al emission image confirms earlier findings of clumpiness and an extent along the entire plane of the Galaxy, supporting its origin from massive-star groups. INTEGRAL spectroscopy resolved the line and found Doppler broadenings and systematic shifts from large-scale galactic rotation. But an excess velocity of ~200 km/s suggests that 26Al decays preferentially within large superbubbles that extend in forward directions between spiral arms. The detection of 26Al line emission from nearby Orion and the Eridanus superbubble supports this interpretation. Positrons from beta+ decays of 26Al and other nucleosynthesis ejecta have been found to not explain the morphology of positron annihilation gamma-rays at 511 keV that have been measured by INTEGRAL. The 60Fe signal measured by INTEGRAL is diffuse but too weak for an imaging interpretation, an origin from point-like/concentrated sources is excluded. The 60Fe/26Al ratio is constrained to a range 0.2-0.4. Beyond improving precision of these results, diffuse nucleosynthesis contributions from novae (through 22Na radioactivity) and from past neutron star mergers in our Galaxy (from r-process radioactivity) are exciting new prospects for the remaining mission extensions.
description: 38 pages, 12 Figures. Contribution to Review Book "15 years of INTEGRAL". Accepted for publication in New Astronomy Reviews
Scour and fill in a gravel-bed channel : observations and stochastic models
Creators: name: Haschenburger, Judith Kay
Publisher: name: University of British Columbia
Year: 2009

description: This study investigates channel bed scour and fill as a result of individual flood events in a gravel-bed channel. Given the complexity of interactions between hydraulic force, the texture and arrangement of bed material, and input of sediment to a particular point of the channel bed, study objectives were pursued with the view that bed material movement is a stochastic phenomenon. A two-year field program was conducted in Carnation Creek, a small gravel-bed stream draining 11 km2 on the west coast of Vancouver Island, British Columbia. In the 900 m study reach, an array of measurement techniques, including scour indicators, magnetically-tagged stones, and conventional survey, yielded information about the fluctuations of the channel bed elevation and movement of scoured material for individual flooding periods. Frequency distributions of scour and fill depths associated with individual flooding periods are adequately modeled by negative exponential functions over the range of flood peak magnitudes observed in Carnation Creek. Analysis of scour depths measured in streams on the Queen Charlotte Islands demonstrates the applicability of the exponential model to flooding periods and flood seasons. Further, exploratory analysis suggests that a regional scour depth model is possible. Power functions relating mean depths of scour and fill to flood peak discharge show that depth increases with an increase in peak magnitude. Observed maximum scour depths in flooding periods are linked, in general, to streambed conditions influenced by antecedent flow conditions. These patterns in scour and fill exist within an overall pattern of increasing variability in depths of scour and fill as peak discharge increases. Evaluation of a heuristic model for mean travel distance as a function of particle size proposed by Church and Hassan (1992) provides convincing evidence for its general merit. Mean travel distance decreases inversely with particle size as size increases beyond the median diameter of subsurface sediment. This trend is consistent in both individual flooding periods as well as flood seasons. The majority of material finer than the median diameter of surface sediment is supplied from subsurface material, which influences the travel distances of these finer fractions because of burial. Computation of volumetric transport rates of bed material, based on the active scour depth and width of the channel bed, the virtual velocity of particle movement, and sediment porosity, suggests the potential for building scale correlations with streamflow, which have usually been defined by bedload sampling during floods. Error analysis indicates that determination of active width contributes most significantly to the imprecision of transport rate estimates. Results underscore the stochastic nature of sediment transport in gravel-bed channels.
Lithium depleted stars in the young sigma Ori cluster
Creators: name: Sacco, G. G.
name: Randich, S.
name: Franciosini, E.
name: Pallavicini, R.
name: Palla, F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Context: Knowledge of the age distribution of stars in young clusters and associations is crucial to constrain models of star formation. HR diagrams of different young clusters and associations suggest the presence of age spreads, but the influence of errors on the derived ages is still largely debated. Determination of lithium abundances in low-mass stars represents an alternative and robust way to infer stellar ages. Aims: We measured lithium in a sample of low mass members of the young (4-5 Myr) sigma Ori cluster with the main goal of investigating its star formation history. Methods: Using the FLAMES multi-object spectrograph on VLT/UT2, we obtained spectra of 98 candidate cluster members. The spectra were used to determine radial velocities, to infer the presence of Halpha emission, and to measure the strength of the Li 670.8 nm absorption line. Results: Using radial velocities, Halpha and Li, together with information on X-ray emission, we identified 59 high probability cluster members. Three of them show severe Li depletion. The nuclear ages inferred for these highly depleted stars exceed 10-15 Myr; for two of them these values are in good agreement with the isochronal age, while for the third star the nuclear age exceeds the isochronal one.
description: 4 pages, 4 figures, Accepted for publication in A&A Letters
Eigenstate thermalization scaling in approaching the classical limit
Creators: name: Nakerst, Goran
name: Haque, Masudul
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: According to the eigenstate thermalization hypothesis (ETH), the eigenstate-to-eigenstate fluctuations of expectation values of local observables should decrease with increasing system size. In approaching the thermodynamic limit - the number of sites and the particle number increasing at the same rate - the fluctuations should scale as $\sim D^{-1/2}$ with the Hilbert space dimension $D$. Here, we study a different limit - the classical or semiclassical limit - by increasing the particle number in fixed lattice topologies. We focus on the paradigmatic Bose-Hubbard system, which is quantum-chaotic for large lattices and shows mixed behavior for small lattices. We derive expressions for the expected scaling, assuming ideal eigenstates having Gaussian-distributed random components. We show numerically that, for larger lattices, ETH scaling of physical mid-spectrum eigenstates follows the ideal (Gaussian) expectation, but for smaller lattices, the scaling occurs via a different exponent. We examine several plausible mechanisms for this anomalous scaling.
description: 17 pages, 9 figures
Direct and bulk-scattered forward-shock emissions: sources of X-ray afterglow diversity
Creators: name: Panaitescu, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: I describe the modifications to the standard forward-shock model required to account for the X-ray light-curve features discovered by Swift in the early afterglow emission and propose that a delayed, pair-enriched, and highly relativistic outflow, which bulk-scatters the forward-shock synchrotron emission, yields sometimes a brighter X-ray emission, producing short-lived X-ray flares, X-ray light-curve plateaus ending with chromatic breaks, and fast post-plateau X-ray decays.
description: 6 pages, submitted to the proceedings of 2007 GRB meeting, Santa Fe, NM, Nov 5-9 2007
One-Dimensional Edge Contact to Encapsulated MoS2 with a Superconductor
Creators: name: Seredinski, A.
name: Arnault, E. G.
name: Costa, V. Z.
name: Zhao, L.
name: Larson, T. F. Q.
name: Watanabe, K.
name: Taniguchi, T.
name: Amet, F.
name: Newaz, A. K. M.
name: Finkelstein, G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Establishing ohmic contact to van der Waals semiconductors such as MoS2 is crucial to unlocking their full potential in next-generation electronic devices. Encapsulation of few layer MoS2 with hBN preserves the material's electronic properties but makes electrical contacts more challenging. Progress toward high quality edge contact to encapsulated MoS2 has been recently reported. Here, we evaluate a contact methodology using sputtered MoRe, a Type II superconductor with a relatively high critical field and temperature commonly used to induce superconductivity in graphene. We find that the contact transparency is poor and that the devices do not support a measurable supercurrent down to 3 Kelvin, which has ramifications for future fabrication recipes.
description: 5 pages, 4 figures
Reply to: Critical revision of the ZEPLIN-I sensitivity to WIMP interactions
Creators: name: Smith, N. J. T.
name: Murphy, A. S.
name: Sumner, T. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Recent objections (Phys.Lett. B 637, 156) to the published Zeplin I limit (Astropart. Phys 23, 444) are shown to arise from misunderstandings of the calibration data and procedure, and a misreading of the data in one of the referenced papers.
description: 5 pages
A new challenge for time-dependent density-functional theory
Creators: name: van Faassen, Meta
name: Burke, Kieron
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Time-dependent density functional theory is thought to work well for the test cases of He and Be atoms. We perform a quantum defect analysis of the s, p, and d Rydberg states of Be with accurate ground state Kohn-Sham potentials. The s- and p-quantum defects are well described by the ALDA, but fails badly for the d-quantum defect. The same failure is observed in case of He. This provides a new challenge for functional development in time-dependent density functional theory.
description: 1 table, 5 figures submitted to Chemical Physics Letters
Cyclopean Geometry of Binocular Vision
Creators: name: Hansard, Miles
name: Horaud, Radu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: The geometry of binocular projection is analyzed, with reference to the primate visual system. In particular, the effects of coordinated eye movements on the retinal images are investigated. An appropriate oculomotor parameterization is defined, and is shown to complement the classical version and vergence angles. The midline horopter is identified, and subsequently used to construct the epipolar geometry of the system. It is shown that the Essential matrix can be obtained by combining the epipoles with the projection of the midline horopter. A local model of the scene is adopted, in which depth is measured relative to a plane containing the fixation point. The binocular disparity field is given a symmetric parameterization, in which the unknown scene-depths determine the location of corresponding image-features. The resulting Cyclopean depth-map can be combined with the estimated oculomotor parameters, to produce a local representation of the scene. The recovery of visual direction and depth from retinal images is discussed, with reference to the relevant psychophysical and neurophysiological literature.
When is Enough Enough? "Just Enough" Decision Making with Recurrent Neural Networks for Radio Frequency Machine Learning
Creators: name: Moore, Megan
name: Clark, William H.
name: Buehrer, R. Michael
name: Headley, William C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Prior work has demonstrated that recurrent neural network architectures show promising improvements over other machine learning architectures when processing temporally correlated inputs, such as wireless communication signals. Additionally, recurrent neural networks typically process data on a sequential basis, enabling the potential for near real-time results. In this work, we investigate the novel usage of "just enough" decision making metrics for making decisions during inference based on a variable number of input symbols. Since some signals are more complex than others, due to channel conditions, transmitter/receiver effects, etc., being able to dynamically utilize just enough of the received symbols to make a reliable decision allows for more efficient decision making in applications such as electronic warfare and dynamic spectrum sharing. To demonstrate the validity of this concept, four approaches to making "just enough" decisions are considered in this work and each are analyzed for their applicability to wireless communication machine learning applications.
description: IEEE IPCCC 2020
บทวิจารณ์หนังสือ การประเมินความเข้มแข็งทางการคลังขององค์กรปกครองส่วนท้องถิ่น
Creators: name: Weerasak Krueathep
Publisher: name: National Institute of Development Administration
Year: 2006

description: 1, 46, NIDA Development Journal
Probing Subcellular Nanostructure of Engineered Human Cardiomyocytes in 3D Tissue
Creators: name: Javor, Josh
name: Ewoldt, Jourdan K.
name: Cloonan, Paige E.
name: Chopra, Anant
name: Luu, Rebeccah J.
name: Freychet, Guillaume
name: Zhernenkov, Mikhail
name: Ludwig, Karl
name: Seidman, Jonathan G.
name: Seidman, Christine E.
name: Chen, Christopher S.
name: Bishop, David J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Accelerator Physics (physics.acc-ph)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: The structural and functional maturation of human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) is essential for application to pharmaceutical testing, disease modeling, and ultimately therapeutic use. Multicellular 3D-tissue platforms have improved functional maturation of hiPSC-CMs, but probing cardiac contractile properties remains challenging in a 3D environment, especially at depth and in live tissues. Using small angle X-ray scattering (SAXS) images, we show that hiPSC-CMs, matured and examined in a 3D environment, exhibit periodic spatial arrangement of the myofilament lattice, which has not been previously detected in hiPSC-CMs. Contractile force is found to correlate with both scattering intensity (R2=0.44) and lattice spacing (R2=0.46). Scattering intensity also correlates with lattice spacing (R2=0.81), suggestive of lower noise in our structural measurement relative to the functional measurement. Notably, we observe decreased myofilament ordering in tissues with a myofilament mutation known to lead to hypertrophic cardiomyopathy (HCM). Our results highlight the progress of human cardiac tissue engineering and enable unprecedented study of structural maturation in hiPSC-CMs.
description: 12 pages, 6 figures, supplementary material available upon request to the lead author
Additional file 1 of Seminal fluid proteins induce transcriptome changes in the Aedes aegypti female lower reproductive tract
Creators: name: Amaro, I. Alexandra
name: Ahmed-Braimah, Yasir H.
name: League, Garrett P.
name: Pitcher, Sylvie A.
name: Avila, Frank W.
name: Cruz, Priscilla C.
name: Harrington, Laura C.
name: Wolfner, Mariana F.
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1. Supplementary Tables 1-3 and Figures 1-5.
^{7}Li NMR Study of Heavy Fermion LiV2O4 Containing Magnetic Defects
Creators: name: Zong, X.
name: Das, S.
name: Borsa, F.
name: Vannette, M. D.
name: Prozorov, R.
name: Schmalian, J.
name: Johnston, D. C.
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: We present a systematic study of the variations of the ^{7}Li NMR properties versus magnetic defect concentration up to 0.83 mol% within the spinel structure of polycrystalline powder samples and a collection of small single crystals of LiV2O4 in the temperature range from 0.5 to 4.2 K. We also report static magnetization measurements and ac magnetic susceptibility measurements at 14 MHz on the samples at low temperatures. Both the NMR spectrum and nuclear spin-lattice relaxation rate are inhomogeneous in the presence of the magnetic defects. The NMR data for the powders are well explained by assuming that (i) there is a random distribution of magnetic point defects, (ii) the same heavy Fermi liquid is present in the samples containing the magnetic defects as in magnetically pure LiV2O4, and (iii) the influences of the magnetic defects and of the Fermi liquid on the magnetization and NMR properties are separable. In the single crystals, somewhat different behaviors are observed. Remarkably, the magnetic defects in the powder samples show evidence of spin freezing below T ~ 1.0 K, whereas in the single crystals with similar magnetic defect concentration no spin freezing was found down to 0.5 K. Thus different types of magnetic defects and/or interactions between them appear to arise in the powders versus the crystals, possibly due to the substantially different synthesis conditions of the powders and crystals.
description: 18 pages typeset in 2 columns, 16 figures; submitted to PRB
Characterization of dendritic cell and macrophage cell surface proteins
Creators: name: Haidl, Ian D
Publisher: name: University of British Columbia
Year: 2009

description: Dendritic cells play a critical role in the induction of the immune response and execute unique functions in comparison to other antigen presenting cells such as macrophages and B cells. The research in this thesis was directed towards characterizing molecular components of dendritic cells and macrophages. The molecules chosen for study were CD45 and an uncharacterized protein, the F4/80 molecule. CD45 is an important receptor tyrosine phosphatase expressed as various isoforms due to highly regulated alternative splicing. Analysis of CD45 cell surface expression on purified, cultured splenic and thymic dendritic cells, and freshly isolated dendritic cells, demonstrates that dendritic cells express both the CD45R0 and CD45RB isoforms. Biochemical analysis of purified splenic dendritic cells confirms the expression of CD45R0 and CD45RB. In addition, purified splenic dendritic cell CD45 possesses intrinsic tyrosine phosphatase activity. Macrophage CD45 isoform expression is also limited largely to CD45R0 and small amounts of CD45RB or CD45RA depending on the macrophage source. CD45 from macrophages possesses comparable tyrosine phosphatase activity relative to dendritic cell CD45. The demonstration of CD45 phosphatase activity in cells lacking antigen receptors suggests a possible role for CD45 in leukocyte events such as recirculation, homing, heterophilic adhesion events, or signalling via non-antigen specific receptors. The F4/80 molecule was first characterized over a decade ago and is known to be expressed on dendritic cells and macrophages. However, few molecular details of the F4/80 molecule had been elucidated. This study documents that the F4/80 molecule contains N-linked carbohydrates, O-linked carbohydrates, sialic acids primarily in α2-6 linkages to galactose, and chondroitin sulfate modifications. Furthermore, the extensive N-linked carbohydrate modifications contain a dominant component of repeating N-acetylglucosamine or N acetyllactosamine units. The protein contains extensive intramolecular disulfide bonds, has a slow rate of intracellular transport (T[sub]1/2=60 minutes), and has a basic pi of 7.5 for the entire molecule in spite of the negative post-translational modifications. The modifications of the F4/80 molecule described may also account for certain functional properties. For example, chondroitin sulfate can mediate interactions with CD44 and fibronectin, whereas α2-6 linked sialic acids are involved in the binding to CD22. Thus, a substantial description of the biochemical nature of the F4/80 molecule is provided, which leads to direct inferences for potential functions of the molecule. In characterizing CD45 and the F4/80 molecule, this work provides a better understanding of two proteins of dendritic cells and macrophages. This information should assist both the basic understanding of dendritic cell and macrophage biology and in developing experimental and clinical targets for functional modulation of dendritic cells and macrophages.
Contribution of Stellar Tidal Disruptions to the X-Ray Luminosity Function of Active Galaxies
Creators: name: Milosavljevic, Milos
name: Merritt, David
name: Ho, Luis C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The luminosity function of active galactic nuclei has been measured down to luminosities ~10^{42} erg/s in the soft and hard X-rays. Some fraction of this activity is associated with the accretion of the material liberated by the tidal disruption of stars by massive black holes. We estimate the contribution to the X-ray luminosity function from the tidal disruption process. While the contribution depends on a number poorly known parameters, it appears that it can account for the majority of X-ray selected AGN with soft or hard X-ray luminosities
description: 5 pages, 1 figure
Search for Lambda-Doubling Transitions of SiH in Orion KL
Creators: name: Fish, Vincent L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A recent submillimeter line survey of Orion KL claimed detection of SiH. This paper reports on GBT observations of the 5.7 GHz Lambda-doubling transitions of SiH in Orion. Many recombination lines, including C164-delta, are seen, but SiH is not detected. The nondetection corresponds to an upper limit of 1.5 x 10^15 cm^-2 (4 sigma) for the beam-averaged column density of SiH. This suggests that the fractional abundance of SiH in the extended ridge is no more than twice that in the hot core.
description: 4 pages, color, to appear in ApJL
Differential rotation of the solar corona: A new data-adaptive multiwavelength approach
Creators: name: Mancuso, S.
name: Giordano, S.
name: Barghini, D.
name: Telloni, D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: For the purpose of investigating the differential rotation of the solar corona, we analyzed ultraviolet (UV) spectral line observations acquired on both the east and west limbs at 1.7 $R_{\odot}$ by SOHO/UVCS during the solar minimum preceding solar cycle 23. To obtain a reliable and statistically robust picture of the rotational profile, we used a set of simultaneous 400-day long spectral line intensities of five different spectral lines: O VI 1032 A, O VI 1037 A, Si XII 499 A, Si XII 521 A, and H I 1216 A, which are routinely observed by UVCS. The data were analyzed by means of two different techniques: the generalized Lomb-Scargle periodogram (GLS) and a multivariate data-adaptive technique called multichannel singular spectrum analysis (MSSA). Among many other positive outcomes, this latter method is unique in its ability to recognize common oscillatory modes between the five time series observed at both limbs. The latitudinal rotation profile obtained in this work emphasizes that the low-latitude region of the UV corona (about $\pm 20^{\circ}$ from the solar equator) exhibits differential rotation, while the higher-latitude structures do rotate quasi-rigidly. The differential rotation rate of the solar corona as evinced at low-latitudes is consistent with the rotational profile of the near-surface convective zone of the Sun, suggesting that the rotation of the corona at 1.7 $R_{\odot}$ is linked to intermediate-scale magnetic bipole structures anchored near 0.99 $R_{\odot}$. The quasi-rigid rotation rate found at mid and high latitudes is instead attributed to the influence of large-scale coronal structures linked to the rigidly rotating coronal holes. We further suggest that the methodology presented in this paper could represent a milestone for future investigations on differential rotation rates when dealing with simultaneous multiwavelength data.
description: A&A, in press (12 pages, 8 figures)
Stellar Populations in the Center of the Barred Galaxy NGC 4900
Creators: name: Cantin, Simon
name: Mollá, Mercedes
name: Robert, Carmelle
name: Pellerin, Anne
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We characterize the stellar populations in the nuclear region of the barred spiral galaxy NGC 4900 using the integral field spectrometer OASIS and the synthesis code LavalSB and the code from Mollá & Garc\'ıa-Vargas (2000) for the young ($< 10$ Myr) and the old stellar populations, respectively. The high spatial resolution of the instrument allows us to find an old population uniformely distributed and younger regions located at the end of the galaxy bar and on each side of a nuclear bar.
description: 2 pages, 1 fig. contribution to the IAU Symp. 241 Stellar Populations as building blocks of galaxies
Bethe strings in the spin dynamical structure factor of the Mott-Hubbard phase in one-dimensional fermionic Hubbard model
Creators: name: Carmelo, Jose M. P.
name: Cadez, Tilen
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The spectra and role in the spin dynamical properties of bound states of elementary magnetic excitations named Bethe strings that occur in some integrable spin and electronic one-dimensional models have recently been identified and realized in several materials by experiments. Corresponding theoretical studies have usually relied on the one-dimensional spin-1/2 Heisenberg antiferromagnet in a magnetic field. At the isotropic point, it describes the large onsite repulsion U limit of the spin degrees of freedom of the one-dimensional fermionic Hubbard model with one electron per site in a magnetic field h. In this paper we consider the thermodynamic limit and study the effects of lowering the latter quantum problem ratio u=U/4t, where t is the first-neighbor transfer integral, on the line-shape singularities in regions at and just above the lower thresholds of the transverse and longitudinal spin dynamical structure factors. The most significant spectral weight contribution from Bethe strings leads to a gapped continuum in the spectrum of the spin dynamical structure factor +-. Our study focuses on the line shape singularities at and just above the gapped lower threshold of that continuum, which have been identified in experiments. Our results are consistent with the contribution of Bethe strings to the spin dynamical structure factor zz being small at low spin densities and becoming negligible upon increasing that density. Our results provide physically important information about how electron itinerancy affects the spin dynamics.
description: 31 pages, 13 figures. arXiv admin note: substantial text overlap with arXiv:2009.10499
Influence of the pinhole size on the resolution of the 4Pi' microscope studied by means of the optical transfer function
Creators: name: Sandeau, N.
name: Giovannini, H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Optics (physics.optics)
subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: Optical transfer functions are presented for the 4pi' microscope. The effects of the size of the confocal pinhole on the three-dimensional resolution are studied. It is shown that the resolution of the 4Pi' microscope depends weakly on the pinhole size. This result suggest that the pinhole can be removed in order to increase the signal-to-noise ratio.
Minimum Entropy Orientations
Creators: name: Cardinal, Jean
name: Fiorini, Samuel
name: Joret, Gwenaël
Publisher: name: arXiv
Year: 2008
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Computer and information sciences

description: We study graph orientations that minimize the entropy of the in-degree sequence. The problem of finding such an orientation is an interesting special case of the minimum entropy set cover problem previously studied by Halperin and Karp [Theoret. Comput. Sci., 2005] and by the current authors [Algorithmica, to appear]. We prove that the minimum entropy orientation problem is NP-hard even if the graph is planar, and that there exists a simple linear-time algorithm that returns an approximate solution with an additive error guarantee of 1 bit. This improves on the only previously known algorithm which has an additive error guarantee of log_2 e bits (approx. 1.4427 bits).
description: Referees' comments incorporated