cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Performance calculations of rocket tripropellant systems
Creators: name: Murphy, Walter P.
Publisher: name: California Institute of Technology
Year: 1949
Subjects: Aeronautics

description: The purpose of this investigation is to determine the effect on the temperatures and the performance parameters of the addition of (1), liquid hydrogen, and (2), liquid ammonia to three bipropellant systems currently of interest. These bipropellant systems are: nitrogen tetroxide-hydrazine, hydrogen peroxide-hydrazine, and RFNA-hydrazine.

For each of the six tripropeliant systems investigated the chamber temperature, exhaust temperature, and all the important parameters were calculated. These calculations for each system were carried out for both equilibrium flow and constant composition flow assumptions. All the results are listed in tables and the more important parameters are presented in graphical form as well.

One hydrogen containing system and one ammonia containing system are discussed in detail. General results for all systems include the fact that the largest proportionate decreases are observed in the variation of the exhaust and chamber temperatures whereas the specific impulse shows slight increases or proportionate decreases of much smaller magnitude than the proportionate decreases in temperatures.

Several new parameters are introduced in an effort to make possible the prediction of performances of a tripropellant system if the chamber temperature variation is known. These parameters may also be used in an indirect manner to illustrate the relative merit of liquid hydrogen and liquid ammonia as coolants in tripropellant systems.
Distinguishing particle-hole conjugated Fractional Quantum Hall states using quantum dot mediated edge transport
Creators: name: Lai, Hsin-Hua
name: Yang, Kun
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study theoretically edge transport of a fractional quantum Hall liquid, in the presence of a quantum dot inside the Hall bar with well controlled electron density and Landau level filling factor ν, and show that such transport studies can help reveal the nature of the fractional quantum Hall liquid. In our first example we study the ν=1/3 and ν=2/3 liquids in the presence of a ν=1 quantum dot. When the quantum dot becomes large, its edge states join those of the Hall bar to reconstruct the edge states configuration. Taking randomness around the edges into account, we find that in the disorder-irrelevant phase the two-terminal conductance of the original ν=1/3 system vanishes at zero temperature, while that of the ν=2/3 case remains finite. This distinction is rooted in the fact that the ν=2/3 state is built upon the ν=1 state. In the disorder-dominated phase, the two-terminal conductance of ν=1/3 system is (1/5)\frac{e^2}{h} and that of ν=2/3 system is (1/2)\frac{e^2}{h}. We further apply the same idea to the ν=5/2 system which realizes either the Pfaffian or the anti-Pfaffian states. In this case we study the edge transport in the presence of a central ν=3 quantum dot. If the quantum dot is large enough for its edge states joining those of the Hall bar, in the disorder-irrelevant phase the total two-terminal conductance in the Pfaffian case is G^{Pf}_{tot}\rightarrow 2 \frac{e^2}{h} while that of anti-Pfaffian case is higher but not universal, G^{aPf}_{tot}> 2 \frac{e^2}{h}. This difference can be used to determine which one of these two states is realized at ν=5/2. In the disorder-dominated phase, however, the total two-terminal conductances in these two systems are exactly the same, G^{Pf/aPf}_{tot}=(7/3)\frac{e^2}{h}.
description: 21 pages, 14 figures
Dynamics of Entanglement Entropy from Einstein Equation
Creators: name: Nozaki, Masahiro
name: Numasawa, Tokiro
name: Prudenziati, Andrea
name: Takayanagi, Tadashi
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the dynamics of entanglement entropy for weakly excited states in conformal field theories by using the AdS/CFT. This is aimed at a first step to find a counterpart of Einstein equation in the CFT language. In particular, we point out that the entanglement entropy satisfies differential equations which directly correspond to the Einstein equation in several setups of AdS/CFT. We also define a quantity called entanglement density in higher dimensional field theories and study its dynamical property for weakly excited states in conformal field theories.
description: v2: 24 pages, calculations of translationally invariant limit have been corrected in section 4 and 5. References added
Pressure dependence of the charge density wave in 1T-TaS2 and its relation to superconductivity
Creators: name: Ritschel, T.
name: Trinckauf, J.
name: Garbarino, G.
name: Hanfland, M.
name: Zimmermann, M. v.
name: Berger, H.
name: Buechner, B.
name: Geck, J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We present a state-of-the-art x-ray diffraction study of the charge density wave order in 1T-TaS2 as a function of temperature and pressure. Our results prove that the charge density wave, which we characterize in terms of wave vector, amplitude and the coherence length, indeed exists in the superconducting region of the phase diagram. The data further imply that the ordered charge density wave structure as a whole becomes superconducting at low temperatures, i. e, superconductivity and charge density wave coexist on a macroscopic scale in real space. This result is fundamentally different from a previously proposed separation of superconducting and insulating regions in real space and, instead, provides evidence that the superconducting and the charge density wave gap exist in separate regions of reciprocal space.
Dynamics of X-Ray-Emitting Ejecta in the Oxygen-Rich Supernova Remnant Puppis A Revealed by the XMM-Newton RGS
Creators: name: Katsuda, Satoru
name: Ohira, Yutaka
name: Mori, Koji
name: Tsunemi, Hiroshi
name: Uchida, Hiroyuki
name: Koyama, Katsuji
name: Tamagawa, Toru
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Using the unprecedented spectral resolution of the reflection grating spectrometer (RGS) onboard XMM-Newton, we reveal dynamics of X-ray--emitting ejecta in the oxygen-rich supernova remnant Puppis A. The RGS spectrum shows prominent K-shell lines, including O VII He_alpha forbidden and resonance, O VIII Ly_alpha, O VIII Ly_beta, and Ne IX He_alpha resonance, from an ejecta knot positionally coincident with an optical oxygen-rich filament (the so-called Omega filament in the northeast of the remnant). We find that the line centroids are blueshifted by 1480+/-140+/-60 km/s (the first and second term errors are measurement and calibration uncertainties, respectively), which is fully consistent with that of the optical Omega filament. Line broadening at 654 eV (corresponding to O VIII Ly_alpha) is obtained to be less than ~0.9 eV, indicating an oxygen temperature of less than ~30 keV. Analysis of XMM-Newton MOS spectra shows an electron temperature of ~0.8 keV and an ionization timescale of ~2e10 cm^-3 s. We show that the oxygen and electron temperatures as well as the ionization timescale can be reconciled if the ejecta knot was heated by a collisionless shock whose velocity is ~600-1200 km/s and was subsequently equilibrated due to Coulomb interactions. The RGS spectrum also shows relatively weak K-shell lines of another ejecta feature located near the northeastern edge of the remnant, from which we measure redward Doppler velocities of 650+/-70+/-60 km/s.
description: 21 pages, 7 figures, accepted for publication in The Astrophysical Journal
Mapeamento participativo da pesca artesanal em ambiente marinho: desafios e aprendizados no contexto cearense
Creators: name: Thomaz Xavier
name: Regina Balbino
Publisher: name: IVIDES.org, Rio de Janeiro.
Year: 2022

description: Palestra ministrada no Workshop Mapeamento Participativo e Cartografia Social 2022, em 7 de dezembro de 2022. Este é um evento organizado pelo Instituto Virtual para o Desenvolvimento Sustentável - IVIDES.org, com parceria do Laboratório de Cartografia - GeoCart-UFRJ.

Vídeo no canal do IVIDES.org no YouTube: https://youtu.be/SkyT8tQRvc8

Este material está sob a licença Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0). Você pode adaptar esta apresentação e disseminá-la, desde que mencione a autoria, mas não pode usar com fins comerciais.
Arctocephalus galapagoensis Heller 1904
Creators: name: W. Christopher Wozencraft
Publisher: name: Zenodo
Year: 1993
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Carnivora
Otariidae
Arctocephalus
Arctocephalus galapagoensis

description: Arctocephalus galapagoensis Heller, 1904. Proc. Calif. Acad. Sci., ser. 3, 3(7):245. TYPE LOCALITY: "Wenman Island" [Ecuador, Galapagos Isis]. DISTRIBUTION: Specimens recorded only from Galapagos Isis [Ecuador]. STATUS: CITES - Appendix II. COMMENTS: Repenning et al. (1971) supported recognition at the specific level, followed by J. E. King (1983); however, Scheffer (1958) considered galapagoensis conspecific with australis, which would be the most closely related taxon. Reviewed by Clark (1975, Mammalian Species, 64).
description: Published as part of W. Christopher Wozencraft, 1993, Order Carnivora, pp. 279-348 in Mammal Species of the World (2 nd Edition), Washington and London :Smithsonian Institution Press on page 326, DOI: 10.5281/zenodo.7359191
description: {"references": ["Repenning, C. A., R. S. Peterson, and C. L. Hubbs. 1971. Contributions to the systematics of the southern fur seals, with particular reference to the Juan Fernandez and Guadalupe species. Antarctic Research Series, 18: 1 - 34.", "Scheffer, V. B. 1958. Seals, sea lions, and walruses, a review of the Pinnipedia. Stanford University Press, Stanford, CA, 179 pp.", "Clark, T. W. 1975. Arctocephalus galapagoensis. Mammalian Species, 64: 1 - 2."]}
Sensitivity of three-dimensional boundary-layer stability to intrinsic uncertainties of fluid properties: a study on supercritical CO2
Creators: name: Ren, Jie
name: Wu, Yongxiang
name: Mao, Xuerui
name: Wang, Cheng
name: Kloker, Markus
Publisher: name: arXiv
Year: 2025
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The intrinsic uncertainty of fluid properties, including the equation of state, viscosity, and thermal conductivity, on boundary layer stability has scarcely been addressed. When a fluid is operating in the vicinity of the Widom line (defined as the maximum of isobaric specific heat) in supercritical state, its properties exhibit highly non-ideal behavior, which is an ongoing research field leading to refined and more accurate fluid property databases. Upon crossing the Widom line, new mechanisms of flow instability emerge, feasibly leading to changes in dominating modes that yield turbulence. The present work investigates the sensitivity of three-dimensional boundary-layer modal instability to these intrinsic uncertainties in fluid properties. The uncertainty, regardless of its source and the fluid regimes, gives rise to distortions of all profiles that constitute the inputs of the stability operator. The effect of these distortions on flow stability is measured by sensitivity coefficients, which are formulated with the adjoint operator and validated against linear modal stability analysis. The results are presented for carbon dioxide at a representative supercritical pressure of about 80 bar. The sensitivity to different inputs of the stability operator across various thermodynamic regimes show an immense range of sensitivity amplitude. A balancing relationship between the density gradient and its perturbation leads to a quadratic effect across the Widom line, provoking significant sensitivity to distortions of the second derivative of the pressure with respect to the density, $\partial^2 p/\partial ρ^2$. From an application-oriented point of view, one important question is whether the correct baseflow profiles can be meaningfully analyzed by the simplified ideal-fluid model...
Anomalously small resistivity and thermopower of strongly compensated semiconductors and topological insulators
Creators: name: Chen, Tianran
name: Shklovskii, B. I.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In the recent paper we explained why the maximum bulk resistivity of topological insulators (TIs)is so small [B. Skinner, T. Chen, and B. I. Shklovskii, Phys. Rev. Lett. 109, 176801 (2012)]. Using the model of completely compensated semiconductor we showed that when Fermi level is pinned in the middle of the gap the activation energy of resistivity $Δ=0.3 (E_g/2)$, where $E_g$ is the semiconductor gap. In this paper, we consider strongly compensated $n$-type semiconductor. We find position of the Fermi level $μ$ calculated from the bottom of the conduction band and the activation energy of the resistivity $Δ$ as a function of compensation $K$, and show that $Δ= 0.3 (E_c-μ) $ holds at any $1-K \ll 1$. At the same time Peltier energy (heat) $Π$ is even smaller: $Π\simeq 0.5Δ= 0.15(E_c - μ)$. We also show that at low temperatures the activated conductivity crosses over to variable range hopping (VRH) and find the characteristic temperature of VRH, $T_{ES}$, as a function of $1-K$.
Voter models with contrarian agents
Creators: name: Masuda, Naoki
Publisher: name: arXiv
Year: 2013
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: In the voter and many other opinion formation models, agents are assumed to behave as congregators (also called the conformists); they are attracted to the opinions of others. In this study, I investigate linear extensions of the voter model with contrarian agents. An agent is either congregator or contrarian and assumes a binary opinion. I investigate three models that differ in the behavior of the contrarian toward other agents. In model 1, contrarians mimic the opinions of other contrarians and oppose (i.e., try to select the opinion opposite to) those of congregators. In model 2, contrarians mimic the opinions of congregators and oppose those of other contrarians. In model 3, contrarians oppose anybody. In all models, congregators are assumed to like anybody. I show that even a small number of contrarians prohibits the consensus in the entire population to be reached in all three models. I also obtain the equilibrium distributions using the van Kampen small-fluctuation approximation and the Fokker-Planck equation for the case of many contrarians and a single contrarian, respectively. I show that the fluctuation around the symmetric coexistence equilibrium is much larger in model 2 than in models 1 and 3 when contrarians are rare.
description: 3 figures, 1 table
Efficient phase-tunable Josephson thermal rectifier
Creators: name: Martinez-Perez, M. J.
name: Giazotto, F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Josephson tunnel junctions are proposed as efficient phase-tunable thermal rectifiers. The latter exploit the strong temperature dependence of the superconducting density of states and phase-dependence of heat currents flowing through Josephson junctions to operate. Remarkably, large heat rectification coefficients up to 800% can potentially be achieved using conventional materials and standard fabrication methods. In addition, these devices allow for the in-situ fine tuning of the thermal rectification magnitude and direction.
description: 4 pages, 5 color figures
Arctocephalus gazella
Creators: name: W. Christopher Wozencraft
Publisher: name: Zenodo
Year: 1993
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Carnivora
Otariidae
Arctocephalus
Arctocephalus gazella

description: Arctocephalus gazella (Peters, 1875). Monatsb. K. Preuss. Akad. Wiss. Berlin, 1875:393, 396. TYPE LOCALITY: "von Seehunden aus Kerguelenland". Restriced by Scheffer (1958) to "Anse Betsy (49°09'S, 70°11 ' E)." DISTRIBUTION: Islands south of Antarctic convergence (Kerguelen, S Sandwich, S Orkney, Heard, Bouver, S Georgia, S Shetland Isis). STATUS: CITES - Appendix II. COMMENTS: Reviewed by King (1959a, b). Peters' (1875) original description, based on two specimens, was considered by Allen (1880) as invalid (nomen nudum). A year later Peters (1876) learned the second specimen came from St. Paul or Amsterdam Island and gave it the name Otaria (Arctophoca) elegans. Allen (1892) and King (1959b) considered these as subspecific populations. Placed in Arctocephalus by Repenning et al. (1971).
description: Published as part of W. Christopher Wozencraft, 1993, Order Carnivora, pp. 279-348 in Mammal Species of the World (2 nd Edition), Washington and London :Smithsonian Institution Press on pages 326-327, DOI: 10.5281/zenodo.7359191
description: {"references": ["Scheffer, V. B. 1958. Seals, sea lions, and walruses, a review of the Pinnipedia. Stanford University Press, Stanford, CA, 179 pp.", "King, J. E. 1959 a. The northern and southern populations of Arctocephalus gazella. Mammalia, 23: 19 - 40.", "Allen, J. A. 1880. History of North American pinnipeds: A monograph of the walruses, seal-lions, sea-bears and seals of North America. United States Geological and Geographical Survey of the Territories, Miscellaneous Publication, 12: 1 - 785.", "Peters, W. C. H. 1876. Uber die Pelzrobbe von der Inseln St. Paul und Amsterdam. Monatsberichte der Koniglich Preussischen Akademie der Wissenschaften zu Berlin, 1876: 315 - 316.", "Allen, J. A. 1892. A synopsis of the pinnipeds, or seals and walruses, in relation to their commercial history and products, Pp. 367 - 391, in Fur seal arbitration, appendix to the case of the United States before the tribunal of arbitration to convene at Paris. United States Government Printing Office, Washington, D. C., 1: 605 pp.", "King, J. E. 1959 b. A note on the specific name of the Kerguelen fur seal. Mammalia, 23: 381.", "Repenning, C. A., R. S. Peterson, and C. L. Hubbs. 1971. Contributions to the systematics of the southern fur seals, with particular reference to the Juan Fernandez and Guadalupe species. Antarctic Research Series, 18: 1 - 34."]}
title: Aicardi syndrome: Unique baby, unique condition
Creators: name: Karve, Sanidhya
Publisher: name: EURORAD
Year: 2024
Subjects: subject: Paediatric radiology
subject: Neuroradiology brain
subject: Paediatric
subject: MR
subject: Case Series

description: Clinical History: The first patient, a 3-month-old girl baby presented with recurrent episodes of abnormal tonic posturing, frothing, and abnormal blinking of eyes since the 22nd day of her life. Clinical examination demonstrated abnormal facial morphological features like prominent premaxilla and sparse lateral eyebrows.

The second patient, a 6-month-old girl baby with recent abnormal body movements, whose antenatal ultrasound scan demonstrated an interhemispheric cystic lesion in the brain with corpus callosum agenesis. Clinical examination demonstrated mild scoliosis and cleft lip.

description: 3 months, female ; 6 months, female
A Hi-GAL study of the high-mass star-forming region G29.96-0.02
Creators: name: Beltran, M. T.
name: Olmi, L.
name: Cesaroni, R.
name: Schisano, E.
name: Elia, D.
name: Molinari, S.
name: Di Giorgio, A. M.
name: Kirk, J. M.
name: Mottram, J. C.
name: Pestalozzi, M.
name: Testi, L.
name: Thompson, M. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Context. G29.96-0.02 is a high-mass star-forming cloud observed at 70, 160, 250, 350, and 500 microns as part of the Herschel survey of the Galactic Plane during the Science Demonstration Phase. Aims. We wish to conduct a far-infrared study of the sources associated with this star-forming region by estimating their physical properties and evolutionary stage, and investigating the clump mass function, the star formation efficiency and rate in the cloud. Methods. We have identified the Hi-GAL sources associated with the cloud, searched for possible counterparts at centimeter and infrared wavelengths, fitted their spectral energy distribution and estimated their physical parameters. Results. A total of 198 sources have been detected in all 5 Hi-GAL bands, 117 of which are associated with 24 microns emission and 87 of which are not associated with 24 microns emission. We called the former sources 24 microns-bright and the latter ones 24 microns-dark. The [70-160] color of the 24 microns-dark sources is smaller than that of the 24 microns-bright ones. The 24 microns-dark sources have lower L_bol and L_bol/M_env than the 24 microns-bright ones for similar M_env, which suggests that they are in an earlier evolutionary phase. The G29-SFR cloud is associated with 10 NVSS sources and with extended centimeter continuum emission well correlated with the 70 microns emission. Most of the NVSS sources appear to be early B or late O-type stars. The most massive and luminous Hi-GAL sources in the cloud are located close to the G29-UC region, which suggests that there is a privileged area for massive star formation towards the center of the G29-SFR cloud. Almost all the Hi-GAL sources have masses well above the Jeans mass but only 5% have masses above the virial mass, which indicates that most of the sources are stable against gravitational collapse. The sources with M_env > M_virial and that ...
description: 22 pages, 6 tables, 15 figures. Accepted for publication in A&A
Intrinsic switching field distribution of arrays of Ni80Fe20 nanowires probed by $\mathit{in\, situ}$ magnetic force microscopy
Creators: name: Tabasum, M. R.
name: Zighem, F.
name: Medina, J. De La Torre
name: Piraux, L.
name: Nysten, B.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The progress of magnetization reversal of weakly packed ferromagnetic Ni80Fe20 nanowire arrays of different diameters (40, 50, 70 and 100 nm) electrodeposited in polycarbonate membranes was studied by magnetic force microscopy (MFM). For such a low packing density of nanomagnets, the dipolar interactions between neighbouring wires can be neglected. The intrinsic switching field distribution has been extracted from in situ MFM images and its width was found to be considerably smaller than for densely packed nanowire arrays.
description: 4 pages, 5 figures. To appear in Journal of Superconductivity and Novel Magnetism
BZT:a soft pseudo-spin glass
Creators: name: Sherrington, David
Publisher: name: arXiv
Year: 2013
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: In an attempt to understand the origin of relaxor ferroelectricity, it is shown that interesting behaviour of the onset of non-ergodicity and of precursor nanodomains found in first principles simulations of the relaxor alloy $\mathrm {Ba(Zr}_{1-x}\mathrm{Ti}_{x}\mathrm{)O}_3$ can be understood easily by a simple mapping to a soft pseudo-spin glass.
description: Extra explanatory comments and references
Photodynamics of stress in clamped nematic elastomers
Creators: name: Knezevic, Milos
name: Warner, Mark
name: Copic, Martin
name: Sanchez-Ferrer, Antoni
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We describe the complex time-dependence of the build up of force exerted by a clamped photo-elastomer under illumination. Nonlinear (non-Beer) absorption leads to a bleaching wave of a significant cis isomer dye concentration deeply penetrating the solid with a highly characteristic dynamics. We fit our experimental response at one temperature to obtain material parameters. Force-time data can be matched at all other temperatures with no fitting required -- our model provides a universal description of this unusual dynamics. The description is unambiguous since these are clamped systems where gross polymer motion is suppressed as a possible source of anomalous dynamics. Future experiments are suggested.
description: 7 pages, 5 figures
A slender body aeroelastic transfer function including the effects of structural flexibility and nonstationary aerodynamics
Creators: name: Schalin, Pehr H. B.
Publisher: name: California Institute of Technology
Year: 1955
Subjects: Aeronautics

description: On the basis of linearized nonstationary aerodynamics and a normal mode representation of the motion, the aeroelastic transfer functions of a symmetrically oscillating slender body are derived from energy principles.

In the present analysis no structural damping or aerodynamic viscous forces are included, but they are believed not to alter the principal features of the system significantly.

The aerodynamic force expressions, obtained as a side result, turn out to be exceedingly simple in the slender body case.

The final eigenfrequency-analysis and the open loop frequency response of the system chosen in Appendix D indicate that the aerodynamic coupling is low. The eigenfrequencies therefore are accurately obtained from the simple decoupled equations. This also holds for the frequency response in a fairly wide band around each particular resonance frequency.

The magnitude of the response of the elastic coordinates in comparison with rigid body responses at resonance frequencies clearly indicates the importance of elastic effects with respect to closed loop control problems.
Arctocephalus philippii
Creators: name: W. Christopher Wozencraft
Publisher: name: Zenodo
Year: 1993
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Carnivora
Otariidae
Arctocephalus
Arctocephalus philippii

description: Arctocephalus philippii (Peters, 1866). Monatsb. K. Preuss. Akad. Wiss. Berlin, 1866:276, pl. 2a, b, c. TYPE LOCALITY: " Insel Juan Fernandez". Listed by Scheffer (1958) as " Isla Mâs a Tierra, Islas Juan Fernândez, Chile ". DISTRIBUTION: Specimens recorded from Juan Fernandez and San Felix Isis (Chile). STATUS: CITES - Appendix II; IUCN - Vulnerable. SYNONYMS: argentata Philippi, 1871; aurita Tschudi, 1844.
description: Published as part of W. Christopher Wozencraft, 1993, Order Carnivora, pp. 279-348 in Mammal Species of the World (2 nd Edition), Washington and London :Smithsonian Institution Press on page 327, DOI: 10.5281/zenodo.7359191
description: {"references": ["Scheffer, V. B. 1958. Seals, sea lions, and walruses, a review of the Pinnipedia. Stanford University Press, Stanford, CA, 179 pp."]}
Model Independent Analysis of Interactions between Dark Matter and Various Quarks
Creators: name: Bhattacherjee, Biplob
name: Choudhury, Debajyoti
name: Harigaya, Keisuke
name: Matsumoto, Shigeki
name: Nojiri, Mihoko M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Present and future expected limits on interactions between dark matter and various quarks are thoroughly investigated in a model-independent way. In particular, the constraints on the interactions from the Large Hadron Collider (LHC) experiment are carefully considered with focusing on mono jet + missing transverse energy, mono b-jet + missing transverse energy, and top quark(s) + missing transverse energy channels. Model-independent upper limits (expected limits) on the cross section times acceptance for non-standard model events are derived at 7 TeV (8 or 14 TeV) running of the LHC experiment. With assuming that the dark matter is a singlet real scalar or a singlet Majorana fermion, we also put constraints on several operators describing its interactions with up, down, strange, charm, bottom and top quarks. These constraints are compared to those obtained by cosmological and astrophysical observations of the dark matter.
description: 21 pages, 4 figures, v2:some comments are added
Self-improvement of the Bakry-Émery condition and Wasserstein contraction of the heat flow in RCD(K,\infty) metric measure spaces
Creators: name: Savaré, Giuseppe
Publisher: name: arXiv
Year: 2013
Subjects: subject: Functional Analysis (math.FA)
subject: Analysis of PDEs (math.AP)
subject: Metric Geometry (math.MG)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 49Q20, 47D07, 30L99

description: We prove that the linear heat flow in a RCD(K,\infty) metric measure space (X,d,m) satisfies a contraction property with respect to every L^p-Kantorovich-Rubinstein-Wasserstein distance. In particular, we obtain a precise estimate for the optimal W_\infty-coupling between two fundamental solutions in terms of the distance of the initial points. The result is a consequence of the equivalence between the RCD(K,\infty) lower Ricci bound and the corresponding Bakry-Émery condition for the canonical Cheeger-Dirichlet form in (X,d,m). The crucial tool is the extension to the non-smooth metric measure setting of the Bakry's argument, that allows to improve the commutation estimates between the Markov semigroup and the Carré du Champ associated to the Dirichlet form. This extension is based on a new a priori estimate and a capacitary argument for regular and tight Dirichlet forms that are of independent interest.
description: (v2) Minor corrections. A discussion of quasi-regular Dirichlet forms has been added (Section 2.3) to cover the case of a sigma-finite reference measure. The proof of the quasi regularity of the Cheeger energy has been added (Thm. 4.1)
Pseudoconvex non-Stein domains in primary Hopf surfaces
Creators: name: Miebach, Christian
Publisher: name: arXiv
Year: 2013
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 32M05, 32E40

description: We describe pseudoconvex non-Stein domains in primary Hopf surfaces using techniques developed by Hirschowitz.
description: 9 pages; references have been added
Toroidal momentum transport in a tokamak caused by symmetry breaking parallel derivatives
Creators: name: Sung, Tobias
name: Buchholz, Rico
name: Casson, Francis
name: Fable, Emilino
name: Grosshauser, Stefan R.
name: Hornsby, William
name: Migliano, Piereluigi
name: Peeters, Arthur G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: A new mechanism for toroidal momentum transport in a tokamak is investigated using the gyro-kinetic model. First, an analytic model is developed through the use of the ballooning transform. The terms that generate the momentum transport are then connected with the poloidal derivative of the ballooning envelope, which are one order smaller in the normalised Larmor radius, compared with the derivative of the eikonal. The mechanism, therefore, does not introduce an inhomogeneity in the radial direction, in contrast with the effect of profile shearing. Numerical simulations of the linear ion temperature gradient mode with adiabatic electrons, retaining the finite rho* effects in the ExB velocity, the drift, and the gyro-average, are presented. The momentum flux is found to be linear in the normalised Larmor radius (ρ*) but is, nevertheless, generating a sizeable counter-current rotation. The total momentum flux scales linear with the aspect ratio of the considered magnetic surface, and increases with increasing magnetic shear, safety factor, and density and temperature gradients.
On universality of charge transport in AdS/CFT
Creators: name: Sonner, Julian
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We develop the holographic formulation of transport in strongly coupled two-layer systems. We identify a dc conductivity, sigma^dc, that is finite even in a translationally invariant setup, and universal for CFTs with a gravity dual. The thermoelectric conductivity and heat conductivity are fully determined by the electrical conductivity matrix, as a consequence of Ward identities. We use the memory-matrix approach for double-layer systems, together with Ward identities, to show that sigma^dc - extended to finite frequency - has no Drude peak and, similarly, that its universal value is unaffected if translation invariance is softly broken.
description: 25 pages, 1 figure, 1 appendix; v2: typo fixed in (4.2), footnote 8) added, acknowledgement added
Properties of ethylene oxide and hydrazine related to their use as propellants
Creators: name: Robison, William Clay
Publisher: name: California Institute of Technology
Year: 1953
Subjects: Aeronautics

description: NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document.

PART I. Ethylene Oxide as a Monopropellant.

Thermodynamic calculations to determine the theoretical performance of ethylene oxide as a monopropellant have been carried out for various possible decomposition reactions. A survey of the literature on the kinetics of the thermal decomposition of ethylene oxide is presented.

PART II. Experimental Measurement of the Heats of Dissociation of Hydrazine - Water and Hydrazine - Alcohol Systems.

A glass apparatus has been constructed for determining heats of dissociation at low temperatures. Published data on hydrazine-water mixtures have been checked. The heat of dissociation of N[subscript2] H[subscript 4][...]CH[subscript 3]OH has been found to be 8.62 Kcals/mole.
Self-Force and Green Function in Schwarzschild spacetime via Quasinormal Modes and Branch Cut
Creators: name: Casals, Marc
name: Dolan, Sam
name: Ottewill, Adrian C.
name: Wardell, Barry
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The motion of a small compact object in a curved background spacetime deviates from a geodesic due to the action of its own field, giving rise to a self-force. This self-force may be calculated by integrating the Green function for the wave equation over the past worldline of the small object. We compute the self-force in this way for the case of a scalar charge in Schwarzschild spacetime, making use of the semi-analytic method of matched Green function expansions. Inside a local neighbourhood of the compact object, this method uses the Hadamard form for the Green function in order to render regularization trivial. Outside this local neighbourhood, we calculate the Green function using a spectral decomposition into poles (quasinormal modes) and a branch cut integral in the complex-frequency plane. We show that both expansions overlap in a sufficiently large matching region for an accurate calculation of the self-force to be possible. The scalar case studied here is a useful and illustrative toy-model for the gravitational case, which serves to model astrophysical binary systems in the extreme mass-ratio limit.
description: 23 pages, 13 figures, 3 tables. Final published version
Kaiser Family Foundation/Cook Political Report Poll: Sun Belt Voices Project
Creators: name: Cook Political Report
name: Kaiser Family Foundation
Publisher: name: Roper Center for Public Opinion Research
Year: 2021

description: Importance of various issues in deciding 2020 presidential vote (7); prefer President Donald Trump's/Joe Biden's leadership style (1); trust in Trump/Biden to do better job handling various issues (12); Trump job performance (2); Biden approval (1); Biden characteristics (9); Trump characteristics (7); confidence in handling of 2020 presidential election (1); plans to vote (1); concern about coronavirus (COVID-19) exposure during in-person voting (1); worries about election interference (5); vote for Trump/Biden (6); enthusiasm to vote (3); employment loss/change due to coronavirus (1); health/economic impacts of coronavirus on white people/people of color (2); coronavirus impact on future (2); coronavirus testing (1); feelings about coronavirus (2); rating government responses to coronavirus (1); political partisanship (2); ideology (1); governor job performance (1); senator job performance (2); 2016 presidential election (1); voting in 2020 presidential election (1); 2020 election for Congress (3); vote for Roy Cooper/Dan Forest in gubernatorial election (1); health insurance coverage (1).
Photon-induced tunneling in optomechanical systems
Creators: name: Xu, Xun-Wei
name: Li, Yuan-Jie
name: Liu, Yu-xi
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In contrast to recent studies [Rabl, Phys. Rev. Lett. 107, 063601 (2011); Nunnenkamp et al., Phys. Rev. Lett. 107, 063602 (2011)] on photon blockade that prevents subsequent photons from resonantly entering the cavity in optomechanical systems, we study the photon-induced tunneling that increases the probability of admitting subsequent photons in those systems. In particular, we analytically and numerically show how twoor three-photon tunneling can occur by avoiding single-photon blockade. Our study provides another way on photon control using a single mechanical resonator in optomechanical systems.
description: 5 pages, 4 figures
Scattered Emission from z~1 Galactic Outflows
Creators: name: Martin, Crystal L.
name: Shapley, Alice E.
name: Coil, Alison L.
name: Kornei, Katherine A.
name: Murray, Norman
name: Pancoast, Anna
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Mapping Mg II resonance emission scattered by galactic winds offers a means to determine the spatial extent and density of the warm outflow. Using Keck/LRIS spectroscopy, we have resolved scattered Mg II emission to the east of 32016857, a star-forming galaxy at z =0.9392 with an outflow. The Mg II emission from this galaxy exhibits a P-Cygni profile, extends further than both the continuum and [O II] emission along the eastern side of the slit, and has a constant Doppler shift along the slit which does not follow the velocity gradient of the nebular [O II] emission. Using the Sobolev approximation, we derive the density of Mg+ ions at a radius of 12 to 18 kpc in the outflow. We model the ionization correction and find that much of the outflowing Mg is in Mg++. We estimate that the total mass flux could be as large as 330 - 500 solar masses per year, with the largest uncertainties coming from the depletion of Mg onto grains and the clumpiness of the warm outflow. We show that confining the warm clouds with a hot wind reduces the estimated mass flux of the warm outflow and indicates amass-loading factor near unity in the warm phase alone. Based on the high blue luminosities that distinguish 32016857 and TKRS 4389, described by Rubin et al. 2011, from other galaxies with P-Cygni emission, we suggest that, as sensitivity to diffuse emission improves, scattering halos may prove to be a generic property of star-forming galaxies at intermediate redshifts.
description: Manuscript accepted for publication in the Astrophysical Journal. The 22 pages include 2 tables, 10 figures, and an Appendix. Several typos corrected in version 2
Wind tunnel investigation of the aerodynamic characteristics of high lift devices on supersonic wings at low subsonic speed
Creators: name: Densmore, J. E.
Publisher: name: California Institute of Technology
Year: 1949
Subjects: Aeronautics

description: An investigation was made to determine the effect of various high lift devices on a highly sweptforward wing with a leading edge sweep angle of 55 degrees and on a straight wing, both wings having an aspect ratio of 1.72 and the same span.

Experimental tests were made in the Cal Tech - Merrill low speed wind tunnel at Pasadena City College on both types of wing with and without fuselage. High lift devices investigated were extended leading edge flaps, plain leading edge flaps, extended trailing edge flaps, and split flaps. Both 70 per cent and full span configurations were used in each case except for the plain leading edge flaps. All force data was reduced to standard non-dimensional lift, drag, and pitching moment coefficients, and the results presented in standard graphical form. In addition, photographs of tuft surveys were made for typical configurations.

The maximum lift coefficient obtained from the basic wings was approximately the same for both, but the angle of attack for maximum lift was appreciably lower for the straight wing than for the sweptforward wing.

The addition of the fuselage increased the maximum lift coefficient of both the basic wings and of the sweptforward wing with flap configurations, but the fuselage was detrimental to the lift for the straight wing with flap configurations.

Straight wing configurations gave respectively higher maximum lift coefficients and larger lift curve slopes than on the comparable sweptforward wing models. All high lift devices investigated were more effective on the straight wing than on the sweptforward wing.

Extended trailing edge flaps were the most effective of the flaps investigated in increasing the maximum lift, but gave the largest negative increase in the pitching moments.

On the straight wing the 70 per cent span split and 70 per cent span extended trailing edge flaps at optimum flap deflection angles gave a higher maximum lift coefficient than the full span flaps at the optimum flap deflection. When the straight wing was mounted on the fuselage, this effect was true only for the split flaps.
Artificial Collective Intelligence: Beyond AGI
Creators: name: Husbands, Brandon
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 460806
subject: Human-computer interaction

description: The paper on Artificial Collective Intelligence (ACI) presents a novel framework that surpasses traditional Artificial General Intelligence (AGI) by orchestrating specialized models, APIs, and endpoints—called Entity Programs (EPs)—under a central Master Control Program (MCP). ACI emphasizes scalability, task specialization, and resource management, leveraging a distributed system architecture for improved performance in multi-domain problems. The paper includes thought experiments, diagrams, and detailed experiments, illustrating how ACI’s recursive structure and transparency make it more effective than monolithic AGI systems. The system’s observability, self-improvement, and real-world application scenarios further highlight its potential for solving complex problems in domains like healthcare, logistics, and autonomous systems.
Experiments directed toward the total synthesis of the ionophore antibiotic X-537A
Creators: name: Laura, Richard
Publisher: name: California Institute of Technology
Year: 1977
Subjects: Chemistry

description: A synthetic approach to a portion of the carboxylic ionophore X-537A is discussed. A synthesis of the tetrahydropyran ring of this antibiotic via a Diels-Alder reaction followed by hydroboration is described.
Elements of Coevolution in Biological Sequences
Creators: name: Rivoire, Olivier
Publisher: name: arXiv
Year: 2012
Subjects: subject: Biomolecules (q-bio.BM)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Studies of coevolution of amino acids within and between proteins have revealed two types of coevolving units: coevolving contacts, which are pairs of amino acids distant along the sequence but in contact in the three-dimensional structure, and sectors, which are larger groups of structurally connected amino acids that underlie the biochemical properties of proteins. By reconciling two approaches for analyzing correlations in multiple sequence alignments, we link these two findings together and with coevolving units of intermediate size, called `sectons', which are shown to provide additional information. By extending the analysis to the co-occurrence of orthologous genes in bacterial genomes, we also show that the methods and results are general and relevant beyond protein structures.
Observation of surface states with algebraic localization
Creators: name: Corrielli, G.
name: Della Valle, G.
name: Crespi, A.
name: Osellame, R.
name: Longhi, S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We introduce and experimentally demonstrate a class of surface bound states with algebraic decay in a one-dimensional tight-binding lattice. Such states have an energy embedded in the spectrum of scattered states and are structurally stable against perturbations of lattice parameters. Experimental demonstration of surface states with algebraic localization is presented in an array of evanescently-coupled optical waveguides with tailored coupling rates.
description: revised version with Supplemental Material, to appear in Phys. Rev. Lett
Observation of Associated Near-side and Away-side Long-range Correlations in sqrt(s_NN)=5.02 TeV Proton-lead Collisions with the ATLAS Detector
Creators: name: ATLAS Collaboration
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Two-particle correlations in relative azimuthal angle (Delta-phi) and pseudorapidity (Delta-eta) are measured in sqrt(s_NN) = 5.02 TeV p+Pb collisions using the ATLAS detector at the LHC. The measurements are performed using approximately 1 mub^-1 of data as a function of p_T and the transverse energy (SumE_T) summed over 3.1 < eta < 4.9 in the direction of the Pb beam. The correlation function, constructed from charged particles, exhibits a long-range (2
description: 5 pages plus author list (18 pages total), 4 figures, submitted to Physical Review Letter. Additional auxiliary plots can be found at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2012-13/. Change to reference w.r.t v1. Revision corresponds to published version
Study of the pulse power supply unit for the four-horn system of the CERN to Frejus neutrino super beam
Creators: name: Baussan, E
name: Bouquerel, E
name: Dracos, M
name: Gaudiot, G
name: Osswald, F
name: Poussot, P
name: Vassilopoulos, N
name: Wurtz, J
name: Zeter, V
Publisher: name: arXiv
Year: 2013
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The power supply studies for the four-horn system for the CERN to Fréjus neutrino Super Beam oscillation experiment are discussed here. The power supply is being studied to meet the physics potential and the mega-watt (MW) power requirements of the proton driver of the Super Beam. A one-half sinusoid current waveform with a 350 kA maximum current and pulse length of 100 μs at 50 Hz frequency is generated and distributed to four-horns. In order to provide the necessary current needed to focus the charged mesons producing the neutrino beam, a bench of capacitors is charged at 50 Hz frequency to a +12 kV reference voltage and then discharged through a large switch to each horn via a set of strip-lines at the same rate. A current recovery stage allows to invert rapidly the negative voltage of the capacitor after the discharging stage in order to recuperate large part of the injected energy and thus to limit the power consuption. The energy recovery efficiency of that system is very high at 97%. For feasibility reasons, a modular architecture has been adopted with 8 modules connected in parallel to deliver 44 kA peak currents into the four-horn system.
description: latex options changes